Rihanna Celebrates Birthday with Star-Studded Sunday

By Simone Hilliard

Fresh off her Grammy performances with Eminem and Drake, Rihanna took the stage Sunday night to perform a selection of smash hits at the 2011 NBA All-Star halftime show.

The Caribbean beauty belted out "Umbrella," "Only Girl" and "Rude Boy" before Drake joined her for what can only be described as a sexual tension-fueled rendition of "What's My Name," and Kanye West made a surprise Staples Center appearance for "All of the Lights."

Of course, that was just the start of Rih-Rih's star-studded night. According to a People source, the singer then headed to a private Beverly Hills estate to celebrate her 23rd birthday with such special guests as Jay-Z, Mary J. Blige, Snoop Dogg, Zac Efron, Cee Lo Green, Diddy, Ryan Phillippe, Warren G, Joel Madden and Christina Millian.

Ms. Fenty donned a peach and purple fringed cut-out dress and was treated to red velvet cupcakes decorated with the letter 'R' and the Barbadian flag.

Noticeably absent were the singer's ex, Matt Kemp, and old/new rumored flame Drake. Maybe they hosted the after-party.

What did you think of Rihanna's All-Star performance? Sound off in the comments or @MTV3.

Tags Cee Lo Green, Christina Millian, Diddy, drake, Eminem, Jay Z, Joel Madden, Kanye West, mary j blige, Matt Kemp, Rihanna, Ryan Phillippe, Snoop Dogg, Warren G, Zac Ecfron