You're humming along to a song you just heard on the radio, or maybe a jingle from an old commercial. Then, silence falls, but the music plays on... in your head. Welcome to the universal experience ...

The holidays are upon us. 'Tis the season for chestnuts roasting on an open fire, Jack Frost nipping at your nose — and getting songs like Mariah Carey's "All I Want for Christmas Is You" hopelessly ...