I was looking up the Simpsons online and found this. Michelle Kwan will be on the Simpsons episode February 6th, 2005 after the Super Bowl. Probably just a one liner, but she will be on.
Homer and Ned's Hail Mary Pass - Confirmed Airdate: February 6th, 2005 (following the Super Bowl)
After Homer inadvertently performs a wild crowd-pleasing dance at a local carnival, he will stumble across a new career as a "victory dane choreographer." After working for defensive tackle Warren Sapp, basketballers LeBron James and Yao Ming, and figure skater Michelle Kwan (all voicing themselves), he's called upstairs to choreograph the Super Bowl halftime show. In over his head, Homer turns to neighbor Ned for help. Together they create a clean and classy, non-violent, deeply meaningful halftime show, only to have America turn on them for such a "blatant display of decency."