Britney Spears decided to drop in on Nicki Minaj as she hosted an after-party (following her concert in L.A. with Lil Wayne) at The Factory in West Hollywood Friday night (Apr 22). According to sources at the event, it was “complete pandemonium” when Britney entered the building.

“[It] was complete pandemonium,” a source told E! News. “Six people were carried out after hyperventilating. They literally fainted when Britney walked onto the stage where Nicki was hanging. People were crowd surfing to get to the stage. Screams were so loud for Nicki and Brit you couldn’t hear the music. Bouncers couldn’t hold the crowd back.”

Kourtney Kardashian was also spotted in the VIP area of the West Hollywood nightclub, along with Britney’s boyfriend Jason Trawick.

Peep the pics below:

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