From Billboard:

1. Koji Kondo “Super Mario Brothers Theme”
2. Bubba Sparxxx Featuring Ying Yang Twins & Mr. ColliPark “Ms. New Booty”
3. Rascal Flatts “What Hurts The Most”
4. Lalo Schifrin “Mission-Impossible”
5. Dem Franchize Boyz “Ridin’ Rims”
6. 50 Cent & Olivia “Best Friend”
7. D4L “Laffy Taffy”
8. The Black Eyed Peas “My Humps”
9. Henry Mancini “The Pink Panther Theme”
10. Daddy Yankee “Gasolina”

The Henry Mancini Pink Panther Theme reminds me of this Merv Griffin anecdote from Rolling Stone:

Merv estimates that he has made in the neighborhood of $80 million on the song’s [Jeopardy theme song] royalties over the years — and that was before the advent of a new technology that has only made the song more profitable. Recently, Merv opened a piece of mail containing a ”huge” check. ”I couldn’t think what it was for,” Merv says. ”I had to ask the young people in my office, ‘What does this ”ring tone” mean?’ ”