Celeb guests at the party, which went until 4 a.m. Wednesday, also included Paris Hilton and fiancé Chris Zylka.
One insider also tells E! News that Rihanna's boyfriend Hassan Jameel was in attendance at the bash but managed to avoid photographers. Leonardo DiCaprio was also in attendance at the celebration.
Earlier in the day on Tuesday, Rihanna dedicated her birthday post to her mom.
"10958 days ago @monica_fenty became a mother for the first time to her only daughter!" Rihanna wrote on Instagram. "Today is just as much your birthday as it is mine! I love you mom! Thank you for carrying me, birthing me, raising me, supporting me, teaching me, and loving me unconditionally! The woman I am today is because of everything that you are! I thank God for perfectly hand picking you to be my mother when He sent my spirit to you! You are the greatest! Thank you!"
One day before stepping out to celebrate Rihanna's birthday, Toni Braxton confirmed her engagement to Birdman.