Rik Panganiban pointed out last year that the dance scene between Woody and Jessie borrows heavily from a solo spotlight by Todd Yannacone and Frida Segredahl in the Liberation finals at the Ultimate Lindy Hop Showdown 2006.
I decided to take the two videos and place them side-by-side to show how closely they match up. This is about the closest you can come to a cameo in a Pixar movie. It's only Tuesday, but this gets my vote for Awesome Thing of the Week.