Rihanna's third annual Diamond Ball took place in New York last night, September 14, and the guest list was stacked. The host was joined at the event by Kendrick Lamar, Calvin Harris, Dave Chappelle, Cardi B, Lil Kim, JAY-Z, and Beyoncé. At one point in the evening, RiRi and Bey posed for a picture together that sent Stan Twitter into meltdown.
The Diamond Ball raises money for the Clara Lionel Foundation. The foundation was created in 2012 and supports education, health, and emergency initiatives around the globe, helping students from Caribbean countries attend college in the U.S.
Check out the best of the responses to Rihanna and Beyoncé's reunion below.