Rihanna's Nipple Slip Tease
WTF was going on with Rihanna's exploding cleavage at the Grammys last night!?? Looks like she's playing the "is that a nipple slip?" game with us. Click the pics to view in full...

Britney Spears' Nipple Haze
Rihanna's See Through Nipple Slip
Olivia Munn Nipple Slip On Purpose
Keira Knightley's Nipple Slip Taunting
Renee Zellweger's See Through Globes

Images via Ultimate-Rihanna