Sultry soul singer John Legend has collaborated with everyone from Jay-Z to Fergie to Mariah Carey, but he’ll score his biggest hit yet when he goes from solo act to a duo with model Chrissy Teigen later this year. Legend and Teigen started dating in 2007 and got engaged while on a trip to the Maldives in December 2011. Teigen, a Sports Illustrated Swimsuit babe, confessed last year that despite having a career that constantly reaffirms her beauty, it hasn't always been easy dating a man that makes women drool. "I might have had a mental breakdown [in the beginning]," she said. Models: They’re just like us!