You've seen the sitcom, now get ready for the album. This fall, NBC will release Will & Grace: Who's Your Daddy? — a CD featuring songs from (and inspired by) the show. Stars Eric McCormack, Debra Messing, Megan Mullally and Sean Hayes will lend their voices to the disc, which will also include musical cameos by W&G guests Elton John, Cher, Barry Manilow and Kevin Bacon.