Feist's hit song 1234 might not be what you want to use to teach your little one to count -- she leaves out a couple numbers on the way to ten. For an upcoming appearance on Sesame Street, however, she's changed the lyrics to focus on learning to count just to four. Stick with what you know, I say. In advance of the clip appearing on the show, it's made its way to YouTube.

Of course, Feist isn't the only celebrity to show up on Sesame Street. I remember seeing Itzhak Perlman, Yo-Yo Ma, and Billy Joel on the show when I was younger. Now that I have kids of my own, there have been even more great performances -- Ladysmith Black Mambazo, REM, Norah Jones, and Denyce Graves, to name a few.

Feist apparently enjoyed her performance with the Muppets an awful lot -- she told reporters at the Juno awards that "it was the best day of my life. I'm sorry Junos, but the Muppets trump everything!" Who could blame her, after all? Once upon a time, performing at Carnegie Hall was the hallmark of success, but if you ask me, getting to be on Sesame Street beats that hands -- or flippers, or paws, or whatever -- down.