I just heard "Bad Girl" by Rihanna featuring Chris Brown. And I actually like it! It's a different vibe from her but it's a cool song. I can hear this in a club or at a party. I'm sure it'll be a hit for her. Click here to download it.
UPDATE: If you're interested in owning a personalized piece by designer Melody Ehsani(She made Rihanna's "Bad" ring, then click here! She has cute things.