50 first dates

I'm not 100% but I think it's the lead in to "Jamming" or "Jammin" by Bob Marley and the Wailers.
yer right fitz, it's definitely jamming by bob marley.

(although, castore75, the song changes to 'blinded by the light' by Electric Light Orchestra by the time Drew Barrymore is in the restaurant.... don't know which one you're asking....)