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Demi Lovato duets with Nick Jonas onstage in Los Angeles

Singer Demi Lovato stunned fans in Los Angeles on Wednesday night (18Jul12) by inviting her ex-boyfriend Joe Jonas' little brother to join her onstage.

The pop star was performing at the Greek Theater when she introduced the crowd to Nick Jonas, who played guitar and sang with Lovato on the tracks Catch Me and Don't Forget.


Lovato was on tour with Nick and his brothers when she suffered a meltdown in 2010 and checked into rehab for treatment to deal with emotional and personal issues.