New Ylvis Music Video + Ellen Degeneres/iHeartRadio Music Festival Appearances + Signs w/ Warner

[this is a sponsored video, unlike their other official vids via TVNorge, so you'll probably want to kill the semi-distracting ad at the top of the screen]

You can stop around 3 minutes in or so, unless you're just a glutton for punishment, tbh - couldn't find an official vid with just the interview only (Ellen joining in does not make the song any better, lol)

(tWitch has been acting as a guest DJ for Ellen)

Ylvis, of Viral Sensation 'The Fox,' Lands Major Label Deal Ahead of U.S. Live Debut
By Emily Zemler, The Hollywood Reporter
September 21, 2013 11:15 AM EDT

Ylvis performs onstage during the iHeartRadio Music Festival at the MGM Grand Garden Arena on September 20, 2013 in Las Vegas, Nevada.

Photo by Christopher Polk/Getty Images for Clear Channel

The Norwegian YouTube sensation signs with Warner Music Group then performs at Las Vegas' iHeartRadio Music Festival.

Norwegian comedy duo Ylvis made their live U.S. debut at Las Vegas' iHeartRadio festival on Friday, Sept. 20 as the night's surprise guests.

The two musician brothers, Vegard and Bard Ylvisaker, performed their YouTube hit "The Fox" at the MGM Grand Arena in between sets by Chris Brown and Katy Perry, wearing the signature squirrel and fox costumes from their music video, which went viral in recent weeks, garnering some 43 million hits thus far.

"We rented the costumes from the Norwegian Film Institute," Vegard revealed during a sit-down with The Hollywood Reporter on the Ylvis trailer backstage at iHeartRadio. Added Bard: “They wouldn’t let us buy them, so we had to rent them for $50 each."

Watch Ylvis' iHeartRadio performance: [nothing special, if you've seen the music video; just including it if you need a refresher of the song/haven't heard it before, since I'm 99.9% sure this performance was lip-synced to the original track]

The duo also confirmed that, on the heels of the song's runaway success, Warner Music has signed them to a worldwide deal.

Check out Billboard's backstage interview with Ylvis at iHeartRadio MusicFestival:

[Billboard video interview won't embed, go to Source 4 to see it]

A source with knowledge of the negotiations says the label coughed up "huge" money to lock down the act following its success on YouTube. The label is presently promoting the single, helmed by Norwegian producing team Stargate, to Top 40 radio in the States. And perhaps in a first showing of its recently announced partnership with radio giant Clear Channel, secured a slot for Ylvis on the coveted bill only one day ahead of the fest's Friday start.

The pair flew into Vegas from Los Angeles on Friday afternoon following an appearance on The Ellen DeGeneres Show. They'll next appear on Late Night with Jimmy Fallon on Oct. 9.

Still, Bard told THR, for Ylvis, it's laughs first, music second: “We’re comedians. And we like to sing.”

"We'll never pursue pure music as a career," added Vegard. “This is very new for us and everyone is asking, ‘What are you going to do now?’ We don’t know. We’re busy trying to figure out what to do the next day.”

For now, that means recording more songs from their show, both in English and Norwegian, and flying back to Norway for the series' third season, which runs through mid-November.

"The Fox," meanwhile, continues to surge on the U.S. charts. The single is currently No. 25 on the Billboard Hot 100 and just cracked the Top 20 on iTunes.

What's at the heart of the song, you wonder? Vegard broke it down for THR: “I think it came from a genuine wonder of what the fox says. Because we didn’t know. There's not a clear answer to that. If you check out all the YouTube videos with real fox sounds, each is individual. It seems like they decide by themselves. They’re born with a generic voice and they can decide.”

Billboard had the opportunity to talk with Ylvis about the duo's sudden success at the iHeartRadio Music Festival. Speaking with Billboard's Andrew Hampp, the Norwegians revealed how the performance at the festival came about, the process of hooking up with Stargate for "The Fox" and how the song was originally supposed to be an "anti-hit," which backfired on them. Check out the full interview above.

Additional Reporting: Billboard Staff

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I'm seriously doubting that "The Cabin" will blow up like "The Fox," since it's based on Nordic/Scandinavian in-jokes, plus the online video launch was a bit janky. I still thought it was funny (and since I'm highly susceptible to earworms, random bits of the lyrics keep popping up in my brain days later...argh, so annoying!), but that may be largely because there's still a tiny hole in my heart from the Flight of the Conchords just getting together in-between their movie gigs. *sob* (Sorry, The Lonely Island is a very pale imitation, IMO.) Also, I amuse myself imagining that Josh Groban and Christian Kane are secretly brothers in Norway, if you squint.

Favorite official/unofficial comedic parody group of the present (or the past)?