Rihanna: Bikini for Christmas Vacation!

Bikini-clad Rihanna makes the most of her trip to Barbados as she horses around with her brothers Rorrey and Rajad Fenty on Thursday (December 29).

PHOTOS: Check out the latest pics of Rihanna

After Christmas vacation with her family in her native country, the 23-year-old Barbadian singer is going to go back to the studio. On of her fansites asked, “RiRi, when are we getting the full version of ‘Birthday Cake’?” Ri tweeted back, “I promised! 1st on the agenda ’12 #CAKE.”

Listen to the abridged version of “Cake” below!

FYI: Rihanna is wearing a Missoni bikini top and bottom.

30+ pictures inside of bikini-clad Rihanna on Christmas vacation…