The only girl in our world, Rihanna, is one birthday closer to becoming a woman. The NBA All-Star performer celebrated the big 2-3 Guests this past weekend in Los Angeles. Her pop star-studded guest list included Cee-Lo, Mary J. Blige, Jay-Z, Diddy and Snoop Dogg — guess best bud Katy Perry couldn’t make it. The “S&M” songstress looked like she was feeling no pain as she danced, drank and played the night away before enjoying some special Sprinkles cupcakes with a giant “R” frosted across the top. Check out RiRi’s big B-day bash!