This combination of Associated Press File photos, shows, right, trader Andrew Stavros after the close of trading on Aug. 8, 2011 in Chicago, and left, Selena Gomez and Justin Bieber arriving at the 39th Annual American Music Awards on Sunday, Nov. 20, 2011 in Los Angeles. The evening before the Standard & Poor's ratings agency marked down its grade on U.S. debt causing the Dow to lose more than 5 percent, Selena Gomez and then-boyfriend Justin Bieber toped the news at the Teen Choice Awards. (AP Photo)