In this week's top 10 videos that had everyone buzzing: Carrie Underwood  debuts her "Undo It" video, Justin Bieber  is stumped by German, Christina Aguilera  fans fight back, "Dancing with the Stars" gives an awkward tribute to Lady Gaga , and more.
1) Carrie Underwood Debuts "Undo It"
Carrie Underwood's boots were made for walkin', and that's just what they'll do. In the clip for her new single "Undo It," the country star struts around in sexy outfits and leaves her shady ex-boyfriend licking his wounds.
Bonus Kiss-Off: Christina Aguilera fans fight back against those who think the pop star is copying Lady Gaga with this homemade video that proves otherwise. Who's infuencing who? You decide. (Watch )
2) Justin Bieber's German Confusion
Why, New Zealand? Why'd you have to go and mess up the world's love affair with Justin Bieber by mentioning the word German? "I don't know what that means," Bieber says, glancing at the word on a sheet of paper. He's since tweeted that he thought the interviewer was saying "Jewman," but it's too late. German tweens are crying now. Hope you're happy, Kiwis.
Bonus Lanugage Barrier: Ke$ha  brushes up on her French and answers hard-hitting questions like whether she'd rather sing with the Jonas Brothers  or Tokio Hotel . Her answer? "I would choose the Jonas Brothers,'cause I think they need a little rock and roll in their life." (Watch )
3) "DWTS" Does Lady Gaga's "Telephone"
Normally rivals in the ballroom, "Dancing with the Stars" couples united this week in the spirit of Lady Gaga. Watch sex symbol Pamela Anderson, Pussycat Doll Nicole Scherzinger  and football star Chad Ochocino do the cha-cha to the extremely subpar sounds of the "DWTS" house band. You'll never hear "Telephone" the same way again.
Bonus Awkward Lady Gaga Tribute: National Public Radio hosts set aside their gravitas for this very dorky and endearing "Telephone" cover. (Watch )
4) The National Get Medieval
Brooding indie rockers the National set up shop in a castle to perform "Terrible Love," off their soon-to-be-released new album "High Violet."
5) Siobhan Magnus Wins David Letterman's Praise
"American Idol" castoff and Cape Cod glass-blower Siobhan Magnus earns high praise from the late-night host, who seems fascinated by her swirl-print stockings ("Are you tattooed like that?!") and tells her that as far as he's concerned, "You should be our 'American Idol.'" He's not wrong.
Watch More Videos of the Week:
Last Week's Videos 
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