Morrie the Toupee Salesman

I watched Eurotrip recently. It’s mostly a throwaway kind of teen comedy, maybe better than most. But since watching it I’ve got the song that Matt Damon sings in it stuck in my head. Basically Scottie, the protagonist, has just discovered that the love of his life has been sleeping with a musician behind his back, and the same musician performs a song with the above title. Embedding it here so I can find it as needed: