VIDEO : Demi Lovato Talks Boyfriend Wilmer Valderrama's 'Weird' Friendship With Joe Jonas

Demi Lovato couldn't love Wilmer Valderrama more.
But, as the "Cool for the Summer" singer reveals in Cosmopolitan's September issue, their five-year relationship is no fairy tale romance. According to Lovato, her boyfriend has "seen a lot of stuff, too."
Lovato, 22, and Valderrama, 35, have called it quits and reconciled a few times over the years, with the pop star taking the blame for each split. Valderrama isn't jealous of Lovato's working relationship with Nick Jonas, with whom she started a record label. Furthermore, he also happens to be friends with her ex-boyfriend, Joe Jonas!