U.S. comedienne Ellen Degeneres poked fun at Jennifer Lopez on the Halloween edition of her chat show (31Oct07) - by dressing up as the reportedly pregnant pop superstar. DeGeneres appeared to be one of many people who feel sure Lopez is with child, despite denials from representatives and silence from the singer/actress, when she constantly insisted she wasn't pregnant while sporting a ballooning belly throughout the show. Lopez has been performing live sporting what clearly appears to be a baby bump and her designer Roberto Cavalli recently revealed he had to keep changing her stage costumes to accommodate her growing stomach.