'Tie It Up' songstress Kelly Clarkson recently shot a cameo scene with Hollywood superstar Robin Williams for 'The Crazy Ones' and revealed that it was a lot of fun because the writers made her character mean and 'super slutty'. 

She starred in the series opener, alongside Williams and Sarah Michelle Gellar, and revealed that she initially agreed to appear on the show because of how great the cast is so was a little shocked when the script arrived as it wasn't what she expected:

"I said OK, like, who turns down doing a scene with Robin Williams, right? ...So I said yes because they said I was going to be playing myself and then all of a sudden I get the script and it's like a super slutty mean version of myself!!! But honestly it worked way better. I was so glad they made it like that because it was more fun to play someone I'm not! It was actually acting!"

Writing on her official Twitter page about watching herself on television, she joked: "Just watched myself on @CrazyOnesCBS ....didn't breathe the entire time ha! Thanks to the cast & crew for letting me be a part of it :)"