Britney Spears: Nicki Minaj After Party!

Britney Spears hits Nicki Minaj‘s official after party at The Factory nightclub on Friday (April 22) in West Hollywood, Calif.

Earlier in the evening, Nicki performed at L.A.’s Staples Center during Lil Wayne‘s I Am Still Music tour.

“Hanging with my girl @NickiMinaj at her after party at The Factory. Love you girl,” the 29-year-old pop princess, who left the bash with boyfriend Jason Trawick, tweeted about her Femme Fatale tourmate.

A source tells JustJared.com six people had to be carried out after fainting when Brit walked onto the stage!

“I had such an amazing time hanging with Nicki and all the boys … Nicki is such a star and is so sweet and you could feel the heat and the energy from the crowd the minute we walked in. I think this summers tour with Nicki is going to be my best ever. I cant wait!” Britney said.

15+ pictures inside of Britney Spears and Nicki Minaj at an after party…