When Sandra Oh gets up from a table, her shirt briefly rides up to expose her belly button. It happens at 46:40 of the movie “Sideways” (2004).
Back-Up:
https://www.imagebam.com/view/MEV9PBM
https://www.imagebam.com/view/MEV9PCJ
You also get to see Sandra Oh’s belly button showing when she is jumping in a part in Grey’s Anatomy Season 1 Episode 5 ‘Shake Your Groove Thing’. At around 29:10