"Trouble" is a song by Australian rapper Iggy Azalea featuring American singer Jennifer Hudson, taken from Reclassified, the former's 2014 reissue of her debut studio album The New Classic. The song was produced by The Invisible Men and Salt Wives.

In December 2014, Azalea revealed the track would be the official second promotional track off the reissue, although no specific date for the single to be released digitally or serviced to radios was reported. It was then announced that the song would be impacting mainstream radio stations in the US on 24 February 2015, with an accompanying music video also shot earlier that month. The video premiered on 27 February 2015 on Vevo.

The song achieved commercial success, reaching the top ten in Australia and the UK, top twenty in Ireland, as well as charting in other major international territories including the US, Canada and Belgium. It was nominated for Song of the Year at the 2015 ARIA Music Awards.

Background and release On 4 September 2014, Azalea announced that she would be reissuing her debut studio album The New Classic. In October 2014, details of the reissue started to be revealed and that it would be officially released in November. During an interview with Radio.com backstage at the CBS Radio We Can Survive concert at the Hollywood Bowl on 24 October 2014, Azalea talked about her upcoming re-release Reclassified. With the expanded version of the album, Azalea got to team up with Jennifer Hudson for a second time, after being featured on Hudson's song "He Ain't Goin' Nowhere" off her third studio album JHUD, "It kind of has a doo-wop feel," Azalea said, also mentioning her desire to do something different from her musical style and being excited about performing it; "It's kind of something you'd picture Aretha Franklin singing."

In December 2014, Azalea shared through her Twitter account that she was preparing her next single, "Trouble", as the second promotional track off the reissue, while also announcing plans to shoot a music video for the previous single "Beg for It" had been scrapped. After being questioned by fans about the decision to make the track a single, Azalea answered by noting it was related to radio formats and audience testing explaining, "People need to realize they 'test' the songs with people and give them scores. That's how it works, they pick based on what scores."

On 5 February 2014, during American record producer and music industry executive Clive Davis' annual pre-Grammy Gala press day, Azalea detailed the track saying, "I think it's new for me ... because I usually do things that are so constructed and have so many stage props or choreography, but this is a really different record for me to be able to have me and [Jennifer] perform it and have that relaxed atmosphere." "It has a great, great live vibe to it," Hudson added, "It came to life for both of us when we were performing it together." "Seeing them in rehearsal today, you can see why magic is coming out of the song 'Trouble' that they'll be releasing together. I love to have these collaborations every year, in the past we had Alicia [Keys] with Aretha Franklin, Lou Reed with Rod Stewart, we've had Jennifer [Hudson] with Barry Manilow, we've had combinations that you just don't see. And I think that's why we get everybody coming back year after year," stated Davis while talking about the duo's chemistry.

Azalea claimed she knew right after collaborating for the first time with Hudson she wanted to work on another track with the singer, "I had plans, I don't know if Jennifer had plans," with Hudson responding, "I was ready when I got the call. But I think for us both [the song] took a life of its own especially when we performed it the other day [on Jimmy Fallon]. Something just happened, like a magic kicked off." "I don't think you can anticipate that with any record. It's just that magic of a song, what makes a hit, that no one can really explain, and you can't anticipate until you just perform it and it happens or it doesn't. It definitely has, we got something," both concluded. On 4 February 2015, during their late-night show performance on Jimmy Fallon, the single artwork — an illustration of Azalea and Hudson reminiscent of Grand Theft Auto video game covers — was also unveiled, with both artists sharing it with their fans on Instagram shortly after.

Hudson described being "surprised" on an interview with Billboard when she found out that Azalea wanted to collaborate on "Trouble", but saying "working with her was interesting because it was a different way to see an artist work," explaining, "She's so creative. She actually directed the video and wrote the treatments. I was like, 'hmm, maybe I need to do that'. I got to see another artist work up closely and see her creativity, which inspired my creativity as well. I don't think I've ever worked on a video with the artist being the director." During an interview with Ryan Seacrest on 24 February 2015, Azalea also revealed T.I. orchestrated her first collaboration with Hudson, "He heard that the Jennifer Hudson track, they were looking for a rapper and he was like, 'You should give Iggy a try'," referring to their team-up on the Pharrell Williams-produced "He Ain't Goin' Nowhere" off JHUD, "So I tried the verse not knowing if I would be accepted or not and she loved it and that's how I started working with Jennifer." The song was serviced to mainstream radio stations in the US on 24 February 2015 and an accompanying music video was also shot earlier that month, having premiered on 27 February 2015 through Azalea's Vevo channel.

Critical reception

"Trouble" received generally positive reviews from music critics. Jim Farber of the New York Daily News gave "Trouble" a positive mention, while reviewing Reclassified, stating that it "reaches back further", while comparing it to another album track that he describes as an "updated Giorgio Moroder-style '70s fusion-funk", "We in This Bitch", "to borrow the sprightly piano, exuberant hand claps and tart horn punctuations of a Motown '60s hit. A gutsy guest vocal from Jennifer Hudson adds to the attitude." Mark Beaumont of NME also praised Hudson's contribution pointing out that she "brings soulful sass to the piano-led song." NME named "Trouble" one of Azalea's ten best songs in a list published in 2015, writing that it "hits the sweet spot between craven soul-pop crossover and wind-the-windows-down anthem."

Mike Wass of Idolator said the track "represents an interesting departure for the Mullumbimby babe with its soulful chorus, retro production and mellow rap. It speaks volumes for the femcee's versatility that she pulls it off as easily as a sexy pop anthem like 'Black Widow'." Rory Cashin of State was less impressed with "the piano driven throwback" commenting that it's "perfectly pleasant and jaunty – or in other words, totally forgettable." Jacques Peterson of Popdust noted the track "definitely has the potential to be bigger than "Beg for It" was; it follows the same formula as all of Iggy's hits by having a strong female vocalist serve as the hook singer, while the song's pop-soul production falls right in line with current Hot 100 chart-toppers like Meghan Trainor and Mark Ronson." A writer for Music Times also reviewed the track remarking "a throwback groove reminiscent of the Jackson 5's 'I Want You Back'," complimenting Hudson's appearance on the song as well, "The rapper delivers a firm flow throughout the performance, but the main draw is definitely Hudson. She's in prime vocal form, giving Azalea's track just the right amount of soul." Lewis Corner of Digital Spy gave it three out of five stars, calling it "inescapably catchy" with a "deliciously retro chorus that echoes the kind of classic soulful melody that could soundtrack Motown's finest."

Commercial performance "Trouble" debuted at number 75 on the Australian Singles Chart issued for 23 February 2015, moving up to number 15 the following week. It peaked at number 10 on 16 March 2015, becoming Azalea's third top ten single in Australia after "Fancy" and "Problem", and Hudson's first ever top ten entry. On 2 May 2015, "Trouble" was certified Platinum in that country.

In Canada, the song debuted at number 44 on the Hot Canadian Digital Songs dated for 13 December 2014, charting as an album track, before its single announcement the following year, due to strong digital sales during the debut week of Reclassified. It debuted at number 73 on the Canadian Hot 100 on 11 April 2015. In the United States, "Trouble" initially debuted at number 9 on Billboard's Bubbling Under R&B/Hip-Hop Singles, dated 14 March 2015. On the following week, and after the music video premiere, it appeared on the Bubbling Under Hot 100 Singles at number 14, and also at number 42 on the main Hot R&B/Hip-Hop Songs chart. Moreover, the track debuted at number 38 on the Mainstream Top 40. It debuted and peaked at number 67 on the US Billboard Hot 100, becoming Azalea's ninth charting title, also climbing to number 22 on the Hot R&B/Hip-Hop Songs and number 13 on the Hot Rap Songs charts for the week ending 11 April 2015. Digital sales of the track fueled the chart movement, logging 41,000 downloads, up 534 percent, landing a number twenty-five bow on Billboard'''s Digital Songs.

In the United Kingdom, "Trouble" debuted at number 185 on the UK Singles Chart issued for 8 March 2015, due to lack of streaming and despite being at number 85 on the sales-only based version of the chart. On the UK R&B Chart, the song debuted at number 35 on the same week, moving up to number 11 the following week, and number 8 for the chart issued 22 March 2015. For the chart issued 15 March 2015, the single moved up to number 81, appearing at number 52 on its singles sales version. On 22 March 2015, the track climbed to number 52, and number 32 on the UK Singles Sales Chart. The following week, it moved up yet again to number 43 on the main singles chart, after appearing at number 35 on the official midweek chart update for 1 April 2015. On 26 April 2015, the track placed at number 7 on the sales-only based chart, however due to lack of streaming and only placing at number 41 on the audio streams chart, it then placed at number 13 on the Official UK Singles Chart, becoming Azalea's seventh top 20 hit in that country. On 3 May 2015, the track set another record for Azalea, climbing to number 7 on the official chart and becoming her fifth top 10 UK single, as well as Hudson's first top 10 entry. The track also rose to number 23 on the Official Audio Streaming Chart and number 6 on the official sales-only based chart. It peaked at number two on the UK R&B Chart, spending twenty-seven weeks on the chart. On 22 May 2015, it was certified Silver by the British Phonographic Industry. "Trouble" debuted at number 76 on the weekly Irish Singles Chart for 19 March 2015, peaking at number 20 on its sixth week and spending eighteen weeks on the chart.

Music video On 20 January 2015, Azalea announced music video plans for "Trouble" and that she would be directing it with her stylist Alejandra Hernandez. Azalea and Hudson were then spotted shooting the video for the track in downtown Los Angeles during the first weekend of February 2015. In the '70s-inspired visuals seen on the candid images, Azalea, in a Farrah Fawcett-style hairdo and plunging crop top, had just smashed a red classic sports car (a 1971 Chevrolet Chevelle) into a fire hydrant as part of the cop-and-robber act, while Hudson could be seen dressed as a police officer handcuffing Azalea with both also eventually dancing together in the same street.