Not sure if this counts, but you can see a tiny glimpse of Zooey Deschanel’s belly button as she is cheering at around 1:08:42 of the movie “The New Guy”(2002).
Back-up:
https://www.imagebam.com/view/METGXBV
https://www.imagebam.com/view/METGXBX
https://www.imagebam.com/view/METGXBZ
