We thought her 24th birthday was a great reason (ahem, excuse) to check out her sexiest beach bikinis. Click the pics and leave the pop star a few birthday wishes in the comments.
RiRi tweeted at her fans, thanking them for all the b-day comments, writing:
“Ahhhhhhh ALL MY BDAY wishes from my DM to my TL!!!! KRAY! I truly love u guys, thank you so much #RihannaNavy for makin me feel special.”