"A source tells X17 Brit found out about Sarah Silverman's crappy line
about Britney's babies just moments before she took the stage to perform 'Gimme
More.' Needless to say, Britney was PISSED! ... as any mom would be. Britney was
so upset she walked through her performance just to get it over with (despite
encouragement from her friends, including Sam who was apparently yelling at
Sarah backstage) to skip out on it all together). She held up her end of the
bargain and got a major slap in the face from Sarah. "
Silverman is a bitch, everyone knows that, we all remember the things that she said about Paris. She is also a comedian though, and being a bitch is her job. She does a good job. It is not something that should put you off your professionalism.