Today's annual Halloween Costume Contest was as riotous as ever this morning, with Matt Lauer and Al Roker dressed up as the tabloid's favorite celebrity couple: Jennifer Lopez and Sean "Puffy" Combs. As Lopez, Lauer was decked out in the diva's now-legendary barely-there green Versace number, complete with fake breasts and her trademark enhanced booty. "I was going to chicken out three separate times," Lauer admitted. Roker got off easy wearing Combs's trademark white suit and matching fedora. Katie Couric, meanwhile, appeared as Lucille Ball and Ann Curry was Joan of Arc. Regis Philbin and wife, Joy, were dressed up as a King and Queen on today's Live With Regis and Rosie O'Donnell was Captain Hook on her show. Presidential hopeful George W. Bush also got into the holiday spirit Monday night on the Tonight Show with Jay Leno. Dubya donned a Halloween mask of his Democratic rival, Al Gore. "This is... scary," he quipped.