There are some scenes of Linda Cardellini’s belly button getting exposed in the movie “Scooby Doo” (2002).
The first part is when she is briefly knocked down and repossessed by her soul at around 53:40.
The second part happens when she briefly backs up against the door, which makes her shirt ride up to expose belly button a bit.
There is a slowed down reddit version of this.
There is a also a deleted version of Velma singing ‘I love you baby’ on youtube, and here shirt rides up quickly to expose belly.
