In a new interview with Parade magazine, Ed Sheeran reveals that his most embarrassing moment occured when he first met Christina Aguilera on The Voice. "She brought me in to her dressing room to give me a rundown of how the show was gonna go, and she wasn’t wearing a bra -- and a very tight white top," he explains. Noting that he was 22 at the time, the ginger crooner admits it was "quite hard to concentrate." Sheeran also dishes that he has never ever dated his good friend Taylor Swift and that his current celebrity crush is Zach Galifianakis.