Demi Lovato and Nick Jonas Duet at Her L.A. Show (VIDEO)

Demi Lovato had an old pal join her onstage at her L.A. concert on Wednesday night. The "X Factor" judge, who in 2010 abruptly left the Jonas Brothers tour and checked into rehab, performed a duet with Nick Jonas at the Greek Theater.

Source: http://www.gossipcop.com/demi-lovato-nick-jonas-catch-me-dont-forget-video-duet-la-concert-july-18-2012/

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