CNN has enlisted the help of some big names to help out with a telethon to benefit those effected by the oil spill in the Gulf of Mexico on Monday’s Larry King Live (June 21) . Justin Bieber, Cameron Diaz, Ryan Seacrest, Lenny Kravitz, Randy Jackson from American Idol, Pete Wentz and more will make appearances to raise funds for the United Way, the National Wildlife Federation and the Nature Conservancy.