"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 song was produced by The Invisible Men and Salt Wives. It is the second official single from Reclassified, the first one being Beg For It.
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.