What song is played in Shrek and 10 things you hate about you?

The song played in both "Shrek" and "10 Things I Hate About You" is "All Star" by Smash Mouth. In "Shrek," it is featured in the opening scene as Shrek begins his journey, while in "10 Things I Hate About You," it plays during a lively moment at a party. The upbeat and catchy nature of the song makes it a memorable part of both films.