Joan Rivers  isn't about to let her Fashion Police costar Kelly Osbourne  get pushed around by Lady Gaga.

"Fashion Police is a comedy show. Anyone that comes out of an egg should figure that out," Rivers told Entertainment Tonight.

The slap at the Born This Way singer was a response to her Little Monsters tweeting vicious remarks to Osbourne after she spoke about the singer's weight gain, and an open letter from Gaga herself.

As Breaking Celebrity News  reported, Kelly commented on Brit TV,  “I think she Gaga is pregnant because she has be