Demi Lovato held her first annual Lovato Treatment Scholarship Program fundraiser at the Troubadour in West Hollywood on Wednesday night, and not only was she accompanied by on-again (and much older) beau Wilmer Valderrama, but her ex Joe Jonas DJed the event! Demi and Wilmer have been on and off for years, but after Demi claimed Joe broke her heart back in 2010, we weren't sure if they were on good terms. Now we know!

And speaking of Wilmer, just a few days ago Demi expressed her love for him in an Instagram post, thanking him for being by her side during the tough times. "I wish I could put into words how grateful I am for this man right here,” she captioned a black and white photo of them kissing. “But my love has grown to a level that words could never possibly express how much this man completes me. He’s loved me the way I never thought I deserved to be loved and with this day making my 3rd year sober… After sharing my ups, putting up with my downs and supporting my recovery… he still never takes credit and I want the world to know how incredible his soul is. I really wouldn’t be alive today without him. I love you Wilmer."

Anyway, who else attended the event? In addition to several speakers, there were performances by Bea Miller, Christina Perri and Sirah, and Khloe Kardashian and Lance Bass showed their support as well. Demi thanked her famous friends for attending and added, "Each dollar we raise supports the Lovatic Scholarship & helps those struggling with mental health + addiction issues.” The scholarship fund "covers expenses for individuals struggling with mental health and/or addiction issues."

Good for her!