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

Demi Lovato Nick Jonas

3:38 pm, July 19th, 2012

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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.

VIDEO BELOW

Lovato introduced Jonas to the crowd as one of her “greatest friends” before the duo sang “Catch Me” and “Don’t Forget.”

The singer previously dated Nick’s brother Joe Jonas before she went to rehab.

Check out the video below!

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