Popsugar Entertainment Music Stars Singing in Movies Rock Out With These Epic Singing Scenes From Movies September 18, 2014 by Shannon Vestal Robson View On One Page Photo 7 of 39 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Justin Timberlake in Friends With Benefits We knew JT had a great set of pipes, but did we know he knew (most of) the words to the '90s jam "Jump"? Not until Friends With Benefits. Previous Next Start Slideshow MusicMovies