The fourth season of the reality game show Pinoy Big Brother: Teen Edition aired on ABS-CBN for 91 days from April 8 to July 7, 2012. This season surpassed Teen Edition Plus' record of the longest edition of the series by 13 days.

This was the last separate season of this edition to air after all editions were merged into one season starting on Pinoy Big Brother: All In. This was also the first and only season in the series to date where the two-in-one housemates survived a split connection.

Myrtle Sarrosa of Barotac Nuevo, Iloilo emerged as the winner of the season. Karen Reyes was the runner-up, while Roy Requejo and Joj & Jai Agpangan were the finalists.

Development Auditions Auditions were held in major key cities in the Philippines and other parts of the world. A total of 22,305 teens auditioned for the season.

Overview House theme The House for this season remains largely unchanged since Unlimited, except for total redecoration spanning a week since the previous edition's finale. This marked the franchise's fastest House makeover. Visibly so far, there are only five areas of the House: the House itself, the garden, the activity area, a secret hallway leading into Big Brother's Time Machine, and Big Brother's Conference Room. The House is decorated with various items from on the 1970s and 1980s, such as old vinyl records on the walls which Big Brother said that it was inspired by his own teenage life.

Hosts Toni Gonzaga, Bianca Gonzalez and Robi Domingo reprised their roles as hosts. They were joined by Pinoy Big Brother: Celebrity Edition 1 ex-housemate and runner-up John Prats.

Format Twists Two-in-One Housemates: Two housemates who are related biologically or by other means, are joined as one competing housemate, assigned by Big Brother. The status of one would be the status of the other. On Day 71, a split of connections was cast, in which both of the twins survived. Their shared status remained for the rest of the season. House Players: They enter the house to test the remaining official housemates through tasks set by Big Brother and the public. Power of One: The public may only vote once per day per mobile phone number. Big Jump to the Big Night: Housemates compete to have a slot in the finals. SE Voting System: The public is given the chance to vote to save or evict a housemate. The housemate with the lowest net votes of Save and Evict votes combined, is evicted. The system was used in the season finale.

Housemates Nine housemates, an all-male line-up plus female twins, entered the house on Day 1. Twins Jai and Joj were the first two to enter via the garden, hours before opening night to perform a special task for Big Brother. The second batch of six housemates, consisting of an all-female line-up, entered on Day 2 during the late-afternoon Über show. The ages indicated were the housemates' ages upon their entrance to the House.

Name Age on entry Hometown Entered Exited Result 17 Iloilo Day 2 Day 91 15 Oriental Mindoro Day 2 Day 91 17 Camarines Sur Day 1 Day 91 16 Negros Occidental Day 1 Day 91 15 Pampanga Day 1 Day 86 17 Laguna Day 1 Day 83 17 Tarlac Day 1 Day 76 15 Davao City Day 1 Day 70 16 Cebu City Day 2 Day 56 15 Angeles City Day 1 Day 49 13 Davao City Day 2 Day 42 15 Makati Day 2 Day 35 15 Batangas Day 2 Day 28 15 Rizal Day 1 Day 21

Houseguests Similar to the franchise's previous seasons, Big Brother invited guests to his house for special purposes.

Notable houseguest for this season were Luis Manzano, Vice Ganda, Angeline Quinto, Yeng Constantino, Sam Milby, John Prats, Robi Domingo and past winners, Kim Chiu, Melai Cantiveros, Slater Young.

Weekly tasks Task No. Date given Description Result 1 April 11, 2012(Day 04) The Girls' NamesThe male housemates will be forced to wear blacked-out goggles all week long. They should correctly match at least five names to the corresponding female housemates. Passed 2 April 16, 2012(Day 10) Big Deal Task The housemates were divided into teams Blue Whale and Sunny Side-Up. They will have PHP10,000 as seed money for operating a new business. Their businesses have to earn at least PHP15,000 by the end of the week.

Team name Leader Members Earnings Blue Whale Myrtle ClaireClodetKarenRoyTomVince ₱16,830 Sunny Side-Up Alec Joj & JaiKitMarizNikkaRyanYves ₱18,630 Passed 3 April 23, 2012(Day 16) Ipa Mukha Mo The housemates are given two life-sized puppets with customizable facial features. They would have to make a play about respect showing four emotions: happiness, sadness, anger and fear. The housemates can only commit three mistakes (in facial expressions, synchronization, etc.) in order to win the task. Losing the task means no weekly budget.

Assigned Leaders KitKaren Failed4 April 30, 2012(Day 23) PatiBahayan Under the guidance of Pinoy Big Brother: Unlimited winner Slater Young (a civil engineer by trade), the housemates will be divided into three teams that will build a small house using the materials provided. Each house will undergo durability testing by the end of the month. The group with the least sturdy house will have one member be automatically nominated for the next eviction. The name of the task is a portmanteau of the Tagalog words patibayan (test of strength) and bahay (house).

The most hard-working housemate from each group would be the leader. Below are the teams of the weekly task.

Leader Members Ranking Roy AlecJoj & JaiKarenNikkaYves1st Ryan ClaireClodetTom2nd Kit MarizMyrtle3rd Passed 5 May 6, 2012(Day 29) Pinoy Big BulilitThe housemates will be paired up with a child to take care of for the entire week. They will also organize an educational play where their wards will also participate. Passed 6 May 14, 2012(Day 36) Build A Big Dream ConcertThe housemates will organize their own concert and perform in it as well. All funds raised will benefit a local elementary school. Passed 7 May 29, 2012(Day 51) Time is GoldThe housemates will have 30 hours to complete their everyday household chores. This includes preparing the food, eating, taking a bath and other challenges given by Big Utol. Passed 8 June 5, 2012(Day 58) BB RepublicThe male and female housemates will be separated into two groups, who will propose and implement a decree on the other group, with consequences set for violators. Both groups will also be prohibited from talking to each other. Passed 9 June 11, 2012 (Day 64) Raise the Flag The housemates, in pairs, must raise a flag in the garden and keep it flying at all costs. Passed 10 June 18, 2012 (Day 71) Just Got Luck-Key The housemates will open a chest filled with 100 locks only when the song Just Got Lucky by the JoBoxers is played. Failed

: The boys correctly matched all eight names. : Team Blue Whale earned PHP16,830 & Team Sunny Side-Up got PHP18,630. : The housemates committed eight mistakes. : Tom was originally in Kit's team, but when Big Brother asked if the housemates wanted to change teams Tom decided to go to Ryan's team. : This task spanned two weeks. Tom and Karen won Outstanding Performance and Best Performance respectively : Although the housemates were organized by gender, house player Kim was assigned to the boys' group while the girls got Francis. : The housemates only opened 98 out of 100 locks.

Nomination history The housemate first mentioned in each nomination gets two points, while the second gets one point. The percentage of votes shown is the percentage of votes to save unless otherwise stated. Certain factors leading to each housemate's nomination, such as violating show rules against discussing nominations, are noted below.

On Day 70, it was announced right after the eviction night that evictions would now be done every Friday from the usual Saturday starting Day 76 until the last eviction night before the finale. Nomination nights are also moved to Monday from the usual Sunday starting Day 72. Changes of the program schedule were made to free up airtime for The X Factor Philippines.

+Pinoy Big Brother: Teen Edition 4 nomination history #1 #2 #3 #4 #5 #6 #7 Face-to-FaceNomination #9 #10 Big Night Nominationsreceived #8 Eviction dayand date Day 21 Day 28 Day 35 Day 42 Day 49 Day 56 Day 70 Day 76 Day 83 Day 86 Day 91 Nominationday and date Day 15 Day 22 Day 29 Day 36 Day 43 Day 50 Day 64 Day 72 Day 79 Day 86 Myrtle ClaireMariz KarenClaire KarenClaire KarenClodet KarenRyan TomRyan TomYves KarenRoy No nominations Finalist Winner 19 () Karen MarizVincent MyrtleClodet MarizYves MyrtleClodet YvesKit MarizTom YvesTom YvesAlec No nominations Finalist 28 Roy VincentMariz NikkaClaire ClodetMariz ClodetMariz YvesMariz MarizYves YvesRyan MyrtleYves No nominations Finalist 3rd Place 7 Jai & Joj ClaireKit MyrtleClaire ClaireMariz KitClodet KitMyrtle RyanYves YvesRyan YvesRyanNo nominations No nominations 4th Place 0 Ryan VincentMariz NikkaMyrtle ClaireMariz ClodetMariz MarizMyrtle MarizTom YvesTom MyrtleAlecNo nominations No nominations Evicted(Day 86) 11 Alec KitYves KitYves ClaireKaren KitMariz KitYves MarizTom TomYves YvesKaren No nominations Evicted(Day 83) 2 () Yves ClaireNikka NikkaKit MarizClaire KitKaren KitRoy MarizRoy TomRoy RyanRoyEvicted(Day 76) 40 Tom VincentKit MarizYves YvesMariz MarizClodet YvesMariz MarizYves YvesRoy Evicted(Day 70)18 Mariz KarenClodet KarenClaire KarenClaire ClodetKaren KitKaren RyanTom Evicted(Day 56) 42 Kit NikkaClaire NikkaMariz ClaireKaren ClodetMariz MarizYves Evicted(Day 49) 27 () Clodet MarizKit MyrtleKaren KarenTom TomRoy Evicted(Day 42) 17 Claire KarenYves MyrtleKaren YvesTom Evicted(Day 35) 22 Nikka KitKaren MyrtleKaren Evicted(Day 28) 11 Vincent KitClodet Evicted(Day 21) 7 Notes none none none Up forevictionClaireKitMarizVincentKarenMyrtleNikka ClaireKarenKitMarizYvesClodetKarenKitMarizAlecKitYves MarizMyrtleTomMyrtleTomYves KarenMyrtleRyanYves Open Voting Saved fromeviction Kit49.76%Claire17.52%Mariz17.42% Myrtle52.19%Karen32.73% Karen42.44%Yves21.33%Kit13.17%Mariz12.53% Karen55.59%Kit20.89%Mariz12.72% Alec40.81%Yves40.09% Myrtle71.88%Tom19.66% Myrtle52.25%Yves30.49% Myrtle37.83%Ryan22.20%Karen21.94% Myrtle39.58%Karen26.76%Roy12.10%9.85% Myrtle33.92% EvictedVincent15.30% Nikka15.08% Claire10.53% Clodet10.80% Kit19.10% Mariz8.46% Tom17.26% Yves18.03% Alec5.35% Ryan6.36% Karen11.91% Roy9.38% Jai & Joj9.26%

Legend Bold Italicized name Indicates that the housemate won the "Big Jump to the Big Night" and was saved from the last evictions; however was still included to be voted by the public for the Big 4. Automatic nomination (due to violation(s) committed, failure of task, reserved housemate evictions) Granted immunity (due to a successful completion of a "Secret Task", a challenge winner.)

: Before the nomination, Kit and Yves talked about giving points to certain housemates. As a punishment, the two competed in cleaning bed sheets dirtied by the girl housemates but they can only use their elbows and knees to brush the sheets. The loser will automatically get three nomination votes. In the end Kit won, resulting in Yves receiving three points. : Kit automatically nominated himself as punishment for his team building the weakest house in the Patibahayan weekly task. : Alec, Roy, & Ryan talked about nominating the girl housemates one-by-one. Big Brother put the trio up for a basketball challenge and whoever fails will complete the list of this week's nominees. In the end Alec lost, resulting in his automatic nomination. : Myrtle reaped the automatic nomination for talking about not nominating Kit. On the other hand, Tom and Karen won Outstanding Performance and Best Performance respectively. As a reward one of which would either get a Luxury gift for loved ones and immunity. They mutually agreed that Karen will be granted Immunity.