It looks like Demi Lovato is Glee-bound. According to TVLine, she’ll be joining the cast of the show for “at least six episodes,†marking her first regular acting gig since her days on the Disney Channel’s Sonny With a Chance. Lovato will be playing Dani, one of Rachel and Santana’s New York friends — thus giving the X Factor judge plenty of chances to sing duets with Adam Lambert. It’s like a slot-machine jackpot of cross-promotional opportunities for Fox!