DJ AM (left) and Barker (right) at the 2008 MTV VMAs.

ET gives you the backstory of the two celebrities critically injured in Friday evening's plane crash: Travis Barker and Adam Goldstein (DJ AM), the duo who just served as the house band for the 2008 VMAs.

DJ AM, 35, got engaged to Nicole Richie in 2005. They broke up later that year, around the time that DJ AM talked to ET about his dramatic weight loss after undergoing gastric bypass surgery. "I was terrified [of the procedure]," he recalled. "It's a very serious thing, and is by no means the easy way out. It was mainly a health factor." DJ AM also reportedly dated actress Mandy Moore last year.

Barker, 33, is the former drummer of Blink 182, and he starred on his own MTV reality show, "Meet the Barkers," with his ex-wife and former Miss USA Shanna Moakler. After two years of marriage the couple divorced in 2006. They have two children together.