TV star George Lopez may have touched off the latest celebrity feud as he mocked Jay Leno on a radio talk show in Orlando, FL Wednesday, calling him "the biggest two-faced dude in TV" and a "back stabber." He did not disclose what had led to his rant against the Tonight show host. Lopez also charged that Leno was the "worst interviewer on television" and that when he last appeared on the show, one of the producers stood behind him holding cue cards with questions for Leno to read. Lopez said that while he was answering one question, he could see Leno's lips moving as he read the next one.