"Trouble" is a song by Australian rapper Iggy Azalea featuring American recording artist Jennifer Hudson, taken from Reclassified, the former's 2014 reissue of her debut studio album The New Classic.

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.

[5] 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.

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.

[9] 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.

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.

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.

"[16] Mark Beaumont of NME also praised Hudson's contribution pointing out that she "brings soulful sass to the piano-led song.

"[17] 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.

"[18] Mike Wass of Idolator said the track "represents an interesting departure for the Mullumbimby babe with its soulful chorus, retro production and mellow rap.

"[19] 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.

"[20] 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.

"[21] 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.

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.

But it's fairly evident that Jennifer is this badass sassy cop, strong boss lady, and my character is more naïve than one would think from the pictures, and I've kind of stumbled into this Bonnie and Clyde-type of situation that I'm in — thats all I'll say.

"[9] During yet another interview with MTV News, Azalea also promised "a lot of car stuff," plus a beginning, middle and end similar to her previous video for the song "Black Widow".

In the end, the getaway car hits a fire hydrant and Azalea is arrested by Hudson while the boyfriend is cuffed by male officers.

[62] While talking about her experience shooting the video with Hudson, during an interview with 97.1 AMP Radio on 11 March 2015, Azalea said, "I finally met someone who can out 'sass' me.

"[63] On 4 February 2015, Azalea and Hudson performed the song for the first time by teaming up with The Roots on The Tonight Show Starring Jimmy Fallon.

[70] On 26 March 2015, American actor Sean Hayes, best known for his role as Jack McFarland in the sitcom Will & Grace, and his husband, Scott Icenogle, posted a clip of them miming the song to the former's Facebook page.