Usher celebrates his 40th birthday with Diddy, Tyga, Kevin Hart, Chris Brown, Keri Hilson and others (Photos)

Usher Raymond who turned 40 on Sunday celebrated the milestone in a very special way.

The R&B singer threw a separate party at Gold Room in Atlanta and Los Angeles’ Delilah restaurant with celebrities like Diddy, Tyga, Kevin Hart, Chris Brown, Keri Hilson,  Kendall Jenner and many others in attendance.

Continue to see more photos below.