Bret Michaels took one of his greatest hits to a new, genre-crossing level in Orlando on Saturday night (Dec. 14) when two pop stars joined him and his band onstage for one especially "good time." During his set at the Seminole Hard Rock Hollywood's Winterfest in Hollywood, Fla., Michaels got some vocal support from Joey Fatone and Chris Kirkpatrick, who fully embraced Poison's hard-partying vibe. The *NSYNC singers bounded across the stage and joined Michaels on each chorus of Poison's 1988 hit "Nothin' But A Good Time."