Before They Were Gleeks

Who danced with Beyoncé? Which star worked at Wal-Mart? See if you're really in tune with the TV songbirds

Correct Answer: Heather Morris

Morris, who plays ditzy Cheerio Brittany, was initially hired as a choreographer for Glee. "I basically took what I learned as a backup dancer for Beyoncé and helped the kids with the 'Single Ladies' dance," says Morris, who performed with Knowles at the 2008 American Music Awards.