Here are a few more...

"I Want An Alien For Christmas" - Fountains of Wayne
Me, too.

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"Merry Christmas Will Do" - Material Issue

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"River" - Robert Downey Jr.
For nestra. RDJ can sing. Who knew?

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"Santa Claus Is Coming to Town" - Bruce Springsteen
A classic.

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"Christmas (Baby Please Come Home)" - U2

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"She Feels Like Christmas Day" - The Critics

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"Christmas Medley" - Barenaked Ladies and Sarah McLachlan

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"Christmas Wrapping" - The Waitresses
Their best known song... well, apart from the Square Pegs theme.

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"Father Christmas" - The Kinks
Have yourself a very merry Christmas, have yourself a good time, but remember the kids who got nothing, when you're drinking down your wine...

You can click here for the entire sack o'tunes.