Demi Lovato Is Pinz Pretty

Demi Lovato leaves Pinz after bowling with a group of friends on Friday (August 19) in Los Angeles.

The birthday girl, who turns 19 TODAY (August 20), later stopped by a local 7-Eleven to pick up a pack of sugar-free Red Bull.

The night before, Demi kicked off the b-day festivities a bit early with a bash at Hollywood’s Beacher’s Madhouse where everyone was dressed glam rock!

“Demi mingled with everyone and was such a sweetheart,” a source told People, adding that guests included Tiffany Thornton, Hunter Parrish, and Derek Hough.

In case you missed it, check out the artwork for Demi‘s upcoming album, Unbroken!