rihanna-armani-bts.jpg Armani

Some brand new behind-the-scenes footage of Rihanna's Emporio Armani underwear photo shoot has hit the web, and the R&B hottie shows off her goodies -- and why she was chosen to replace Megan Fox as the brand's spokesmodel.

RiRi also chats about switching up her hair color, telling director Johan Renck, "We did a whole transformation so now Im a blonde and not a red head anymore ... and I like it." Hmm, but do YOU like it? Check out the video below!