Joe Jonas stopped by Watch What Happens Live on Thursday night, and things definitely got interesting. In an exciting moment of honesty, the DNCE singer gamely agreed to play a round of "Shag, Marry, Kill" during the Plead the Fifth segment of the show, which involved his most high-profile ex-girlfriends: Taylor Swift, Gigi Hadid, and Demi Lovato. "I'll marry Demi, she's a friend," he said. "Shag Taylor. Kill Gigi." Host Andy Cohen and fellow guest and supermodel Ashley Graham, who also starred in the band's music video for "Toothbrush," both expressed surprise at his choice, admitting they hadn't even known Joe dated Taylor. "We were children, 18, 19," he laughed. "Young enough." Watch the video above to see what else he reveals!