Rihanna & Pharrell Williams perform 'Lemon' @ Diamond Ball #performance #video

Rihanna and Pharrell Williams performed their single 'Lemon' at her fifth annual Diamond Ball, last night. This is like, only the second time Rihanna has performed the song with Pharrell, so to see it performed at all is like a national treasure. I'm surprised she even attempted some dance moves in that dress, though it was nice to see Ri get her groove on much to the delight of fans. This is the Rihanna they are all waiting for: Rihanna, the singer/performer. R9, roll on!