Demi Lovato has reunited with an ex-boyfriend…

But it’s not what you think!

The 22-year-old part-Mexican American singer-actress joined forces with her ex, Joe Jonas, for a special Camp Rock reunion when she made a tour stop in Los Angeles over the weekend.

Nearly six years after the Disney Channel original movie that they starred in together premiered, the two singers performed one of the songs from the film for the crowd at the Staples Center.

“You want to hear me play a really old song?” Lovato said while introducing the song. The intro of “This Is Me” kicked in and fans in the audience began freaking out. They sang along and screamed louder when Jonas appeared onstage mid-song to sing his part. She gave him a big hug after finishing the duet.

After the performance, Jonas posted an Instagram photo of him and Lovato onstage, saying, “Surprise LA! @DDLovato thank you for having me.” He also shared a video taken during a rehearsal and captioned it, “Tonight was amazing. Fun keeping this a secret.”

Jonas wasn’t the only special guest at Lovato’s L.A. concert. The “Really Don’t Care” hitmaker was also joined by Blink-182‘s drummer Travis Barker. She took to Instagram to share several photos of her performing with her guests.