Britney Spears Doesn't Know Andy Cohen

Well here’s something you don’t see every day...

While performing her 2007 classic "Freakshow" last night during a concert at Radio City Music Hall in New York City, Britney Spears engaged in some light BDSM with out talk show host Andy Cohen.

After Britney’s dancers dressed Cohen in a harness, Spears walked the talk show host on a leash on all fours!

Following the set, Cohen bowed down to the pop icon.

That’s when Britney pulled a Mariah and said, "I think you all know who this is...Give it up for him!" (Maybe she forgot his name?)

She then signed a t-shirt for Cohen, and as he left the stage, Britney said, "Ow… ears…he’s loud."

Watch the video below!