Tax Day is April 15, except this year it's not. This year it's April 17—because April 15 is a Sunday, and April 16 is Emancipation Day, a holiday, in the District of Columbia. So, you've got until Tuesday to file your taxes. But why do that when you can watch YouTube videos instead? To make yourself at least feel like you're doing something tax-related, check out the 10 tax-preparation commercials below—the most viral tax spots online, according to Unruly Media.  You'll recognize the guys at No. 10. It's Rhett & Link  doing their tax rap, which earned them third place in a TurboTax contest back in 2007—long before they became Commercial Kings on IFC.