Jessica Biel and Justin Timberlake at a Costume Institute Gala on May 3, 2010
After four years of dating, Justin Timberlake and Jessica Biel broke up in March 2011. One major glitch: Justin got his sexy back with actress Olivia Munn, with whom he had a steamy affair involving "amazing sex," reports Us Weekly. Despite the rumors, Jessica and Justin got back together in October 2011 after only a handful of months apart. And now they're engaged!