Serena on Letterman-again?

Yesterday, Serena said she filmed a segment of Letterman that will be shown Monday night. Is this a re-run??

No, I don't think it's a re-run. Her hair is blonde in the promo that I saw. I don't think it was blonde when she did his show before.

Yeah her hair was blonde when she did his show after Wimbledon. I think its a repeat but I'm not sure.

This is not a rerun because SERENA mentioned the upcoming show in an interview after her match with Dechy.