Justin Bieber + Friends: Demi Lovato

This photo can be summed up in a Spice Girls lyric: "If you wannabe my lover / You gotta get with my friends."

Since Justin Bieber is dating Selena Gomez, it only makes sense that he'd want to get in good with her bestie, Demi Lovato.

Gomez isn't The Biebs' only tie to the 'Stay Strong' starlet. He's good pals with the guys in Big Time Rush, and rumor has it Lovato has been getting cozy with BTR member Logan Henderson.

That's not Bieber's only reason to hang with the 'Skyscraper' singer. He also reportedly wants to duet with her! With lungs like Lovato's, who can blame him?