Sugababes revealed the most embarrassing thing they’ve done on stage in a MySpace video in response to a fan’s question. Keisha Buchanan talked about how falling on stage is usually the most embarrassing thing, with Heidi Range offering a specific instance of falling down the stairs in the middle of a black-out. After the lights came back on, she was on all fours and had to perform the rest of the show with scraped up knees. Watch the response below.