What a fete!

Jennifer Lopez celebrated her 45th birthday with a star-studded bash at Hamptons hotspot Nammos last night, and it looks like it was blast!

Jenny from the Block was joined by more than 100 guests, including rumored beau Maksim Chmerkovskiy and Khloe Kardashian and boyfriend French Montana. Other invitees included Russell Simmons, Leah Remini, Andy Cohen, Kelly Ripa, Kristin Chenoweth, Rachel Zoe, Brian Atwood, and longtime manager Benny Medina.

"Jennifer was dancing with Leah Remini for a while and smiling and greeting everybody," a source dished to Us Weekly.

The singer was surprised with a massive cake that had a woman who resembled J.Lo sitting on a lion! The party carried on into the wee hours of the morning and didn't wrap up until after 4AM.

She just gets better with age!