Demi Lovato Looks So Cute While Playing 'What's In The Box?' on 'Ellen' - Watch!

Demi Lovato is feeling the pop princess fantasy with Ellen DeGeneres!

The 25-year-old “Sorry Not Sorry” powerhouse vocalist graciously played the part of prize model during Monday’s episode (October 30) of The Ellen DeGeneres Show.

PHOTOS: Check out the latest pics of Demi Lovato

Demi was a good sport during the game as Ellen made her run all over the stage in her princess dress.

During her appearance on the show, Demi also talked to Ellen about her new YouTube documentary Simply Complicated and announced her upcoming tour with DJ Khaled.

Watch Demi on Ellen below!