One song is a nuanced critique of American xenophobia, the other is performed by Green Day! Zing!
Weird Al's Cameo: https://www.facebook.com/colbertlateshow/videos/859963287481757/
Michael's plugs n' stuff: https://www.facebook.com/michaelwilliamhunter/
"Dvorak Polka" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/
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