Demi Lovato Slays in Brooklyn ... During 'Tell Me You Love Me' World Tour

3/17/2018 8:01 AM PDT

Demi Lovato Slays at Her 'Tell Me You Love Me' World Tour

Demi Lovato brought the house down Friday night during her "Tell Me You Love Me" world tour at Barclays Center in Brooklyn.

Celebs and fans went crazy for her. DJ Khaled opened the show. Demi also invited Iggy Azalea, Kehlani, and J Balvin to join her onstage. 

Demi talked about her stuggles over the years. She said 6 years ago she was drinking vodka out of a Sprite bottled at 9 in the morning and throwing up in a car.  

She's been sober for the last 6 years.

One person we didn't see is Wilmer Valderrama ... who shared a meal a couples of weeks ago with ex-gf Demi. Unclear if they're back together.