02/17/2012 06:02 pm ET Updated Feb 21, 2012

Rihanna's Birthday: Singer Turns 24, Style Evolution (PHOTOS)

Since hitting the scene in 2005 with her first single "Pon de Replay," Rihanna has consistently wowed us with her unique voice and killer style.

From the sexy peek-a-boo Jean Paul Gaultier gown she wore at the 2011 Grammys to her super edgy street style, RiRi's fearless fashion sense definitely keeps us on our toes. And let's not forget the Barbadian beauty's ever-changing hairstyles and color (red is our favorite).

Already the face of Armani Jeans and Emporio Armani Underwear, Rihanna recently announced she'll be launching a fashion reality show in the UK this summer--yet another reason she's one of our favorite fashionistas.