Demi Lovato & Joe Jonas Are Doing 'Something Big' With Victoria's Secret!

Demi Lovato wears a cute white romper while filming a little something in St. Barth’s on Wednesday afternoon (December 16).

The 23-year-old musician joined her boyfriend Wilmer Valderrama and DNCE‘s Joe Jonas for a concert soundcheck just the night before for an upcoming Victoria’s Secret event.

PHOTOS: Check out the latest pics of Demi Lovato

“#somethingbigiscoming16 #CONFIDENT,” Demi teased on Instagram with polaroids from a little party with the Angels.

She added with a pic of Joe, Stella Maxwell and Sara Sampaio, “What a stud… I guess you never forget how to a bike…”

15+ pics inside of Demi Lovato and Joe Jonas…