"Trouble" is a song recorded by English singer and songwriter Natalia Kills for her second studio album of the same name (2013), appearing on it as its closing track. The song's lyrics were written about bad behavior and trouble, while musically, "Trouble" is a midtempo '90s-esque pop rock number that emulates arena rock. The overall sound of the song was praised by contemporary music critics, who also highlighted its placement on the album track listing.

The song was featured in the 2014 compilation album Now That's What I Call Music! 49, and has been performed by Kills in some live events. Despite not having been released as a single, director Emile Rafael filmed a video for "Trouble", that explores Kills and her on-screen boyfriend's use of recreational drugs and their relationship; it was released in February 2014. Martin Kierszenbaum produced a remix of "Trouble" which features electronic musician Peaches.

"Trouble" was recorded at Enormous Studios and Record Plant, both located in Los Angeles, California. It was written by Kills and American record producer Jeff Bhasker, who also produced the song. Additional production was provided by Emile Haynie and Guillaume Doubet, who along with Bhasker, programmed all the musical instruments played in the song. Guitars were played by Bhasker and Jimmy Messer; keyboards and background vocals were helmed by the former. He also mixed the song. Audio engineering was handled by Bhasker and Pawel Sek, while mastering was done by Chris Athens at the Chris Athens Masters, located in Austin, Texas.

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