VIDEO: Beyonce Calls Jay's Mistress A Desperate, White, B-Word On Stage!

Check out the video above of Queen Bey over the weekend performing in L.A.! She changed the lyrics to one of her songs (forgive me BeyHive for I have sinned not knowing the song) to call the woman Jay-Z cheated on her with a desperate, white, b***h! Even Kim Kardashian reacted!