Just like many of you, I can't narrow it down to just one, but here's a short list (in no particular order):
Do It Again - Beach Boys
Summon the Heroes - John Williams
Are you Going With Me - Pat Methey Group
Mannix Theme - Jerry Goldsmith (?)
Under The Milky Way - The Church
What Does It Take To Win Your Love - Jr. Walker & The All Stars
Inner City Blues - Marvin Gaye
Daulton Lee - Pat Metheny
Modern Time Blues - Jean Luc Ponty
Hurricane Amore - The Ocean Blue
Be Ever Wonderful - Earth Wind and Fire
It's My Life - No Doubt
Another Star - Stevie Wonder
Deacon Blue - Steely Dan
Pets - Porno For Pyros
Nathan Jones - The Supremes
Can't Do A Thing To Stop Me - Chris Issak