Are you the biggest Lady Gaga fan? Did you love her duet with Elton John at the Grammys? Want to see them and other superstars including Sting and Blondie perform at a private benefit concert? Can you get to New York City? Billboard.com is giving away two pairs of tickets to the Rainforest Fund Benefit Concert on Thursday, May 13 at Carnegie Hall in NYC. Just fill in the form completely by Monday, May 10, 2010 to enter to win. Only one entry per day, please.