Tyga: My Boo's Got Sweet Goodies

Tyga's new chick is dominating Cannes with her luscious flow from head to toe.

The rapper and Demi Rose -- a 21-year-old British lingerie model -- were seen leaving their hotel Thursday and heading to Gotha Club in France. They've been spotted together partying and getting cozy just one week after his split with Kylie.

Tyga ... undisputed rebound champ.