Demi Lovato checks in to LAX airport as she prepares to fly out on Tuesday (November 15) in Los Angeles.

The 19-year-old singer and actress headed to Detroit to begin her tour!

PHOTOS: Check out the latest pics of Demi Lovato

“Leaving for TOUR!!!!!!!!!!!!!” Demi tweeted earlier in the day.

Over the weekend, Demi was a bridesmaid for her pal Tiffany Thornton‘s wedding to Christopher Carney!

Check Demi‘s official site DemiLovato.com for more deets on her tour schedule.

10+ pics of Demi inside…