Hasbro introduced the Tooth Tunes music tooth brushes in 2006. Tooth Tunes play music for 2 minutes to keep kids brushing long enough each time.

Last year 'Let's Get It Started' by the Black Eyed Peas or 'Walk Away' by Kelly Clarkson were favorites, this year Hannah Montana rules.

The bestselling Tooth Tunes brush on Amazon.com is playing the Hannah Montana song Best of Both Worlds.

It is no surprise as kids apparently just go nuts over Hannah Montana. We reported that parents pay up to $3,000 for Hannah Montana concert tickets. A Hannah Montana Tooth Tunes only sets you back about $20.