Taylor Swift Sings Classic Song from TV Show Friends

If you were a fan of the hit TV show friends you definitely know this song.

It was night number 5 for Taylor Swift at the Staples Center in Los Angeles on Wednesday, and she invited a pretty unexpected guest up onstage.

Lisa Kudrow, who played Phoebe on "Friends", came up and jammed with her on the song "Smelly Cat" which if you remember her character played and sang on the show.

Enjoy...