Ain't no party like a Lil Kim Party.

Gabrielle Union was in for a surprise when Lil Kim popped up at her 90s-themed party in Miami on Saturday night.

Union, who was dressed as Gwen Stefani, rapped along with the upmost fervor — like we all would— as Kim performed a surprise medley of "Crush On You," "The jump Off," and a few more of her hits.

Union posted footage from the night's festivities, captioning a post on her Instagram account with, "EPIC NIGHT! Thank you @lilkimthequeenbee for being the legend you are."

READ: Drake Threw a 2000s Themed Party for His Birthday [PHOTOS]

Check out some photos and footage from the party below.