Australia's Wally De Backer, aka Gotye, has won Record of the Year at the Grammy Awards.
It was Gotye's third Grammy of the night.
The Melbourne-based 32-year-old earlier won for best alternative music album and best pop duo/group performance.
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Past winners of record of the year include Frank Sinatra, Michael Jackson, Whitney Houston, U2, Coldplay and Olivia Newton-John.
Somebody That I Used To Know, featuring Kiwi singer Kimbra Lee Johnson, has sold more than 13 million copies worldwide, was No.1 in 18 countries and in the key US market, it was the biggest selling single in 2012.
It sat on top of Billboard's Hot 100 in the US for eight straight weeks.
In the Alternative Album category, De Backer's Making Mirrors was up against Fiona Apple (The Idler Wheel), Tom Waits (Bad As Me), Bjork (Biophilia) and M83 (Hurry Up, We're Dreaming) for Best Alternative Album.
"I don't really feel worthy of being up here," a surprised De Backer said on stage.
In the Best Pop Duo/Group Performance Gotye was nominated for his global hit featuring Kiwi songstress Kimbra, Somebody That I Used to Know.
The other nominees in the category were Florence + the Machine (Shake it Out), fun. (We Are Young), LMFAO (Sexy and I Know It) and Maroon 5 featuring Wiz Khalifa (Payphone).
Gotye has revealed that Kimbra wasn't his first, or even his second, choice for his hit song Somebody That I Used to Know.
The Belgian-Australian artist had already gone through two female singers for the track and was waiting on another vocalist when "she called out".
"I built so much expectation with that vocalist that I was feeling a little crushed," he said backstage after collecting his first Grammy.
It came down to New Zealander Kimbra to sing on the song that was recorded in her apartment.
As for the unnamed singer, Gotye said she makes wonderful music on her own and "shouldn't be mad".
WINNERS IN SELECTED MAJOR CATEGORIES AT THE 55th ANNUAL GRAMMY AWARDS:
Record Of The Year
Somebody That I Used To Know
Gotye featuring Kimbra
Album Of The Year
Mumford & Sons
Song Of The Year
We Are Young
Jack Antonoff, Jeff Bhasker, Andrew Dost & Nate Ruess, songwriters (Fun. Featuring Janelle Monae)
Best New Artist
Best Pop Solo Performance
WinnerSet Fire To The Rain
Pop/duo group performance
Somebody That I Used to Know, Gotye featuring Kimbra.
Traditional pop vocal album
isses on the Bottom, Paul McCartney.
N****s in Paris, Jay-Z, Kanye West.
N****s in Paris, Shawn Carter, Mike Dean, Chauncey Hollis, Kanye West.
Take Care, Drake.
Traditional R&B performance
Love on Top, Beyonce.
Adorn, Miguel Pimentel.
Black Radio, Robert Glasper Experiment.
Lonely Boy, The Black Keys.
El Camino, The Black Keys.
Hard rock/metal performance
Love Bites (So Do I), Halestorm.
Alternative music album
"Making Mirrors", Gotye.
Bangarang, Skrillex featuring Sirah.
Best Pop Vocal Album
Best Rock Performance
The Black Keys
Best Urban Contemporary Album
Best Rap/Sung Collaboration
No Church In The Wild
Jay-Z & Kanye West Featuring Frank Ocean & The-Dream
Best Country Solo Performance
Best Country Album
Zac Brown Band
Latin pop album
MTV Unplugged Deluxe Edition, Juanes.
Latin rock, urban or alternative album
Latin jazz album
Ritmo!, The Clare Fisher Latin Jazz Big Band.
Tropical Latin album
Retro, Marlow Rosado Y La Riquena.
Country duo/group performance
Pontoon, Little Big Town.
Blown Away, Josh Kear, Chris Tompkins.
Go Get It, Mary Mary.
Locked Down, Dr John.
The Goat Rodeo Sessions, Yo-Yo Ma, Stuart Duncan, Edgar Meyer, Chris Thile.
Slipstream, Bonnie Raitt.
"Nobody Knows You," Steep Canyon Rangers.
"Rebirth," Jimmy Cliff.
World music album
The Living Room Sessions Part 1, Ravi Shankar.
Can You Canoe?, The Okee Dokee Brothers.
Spoken word album
Society's Child: My Autobiography, Janis Ian.
Blow Your Pants Off, Jimmy Fallon.
New age album
Echoes of Love, Omar Akram.
Jazz vocal album
Radio Music Society, Esperanza Spalding.
Jazz instrumental album
Unity Band, Pat Metheny Unity Band.
Large jazz ensemble album
Dear Diz (Every Day I Think of You), Arturo Sandoval.
Pop instrumental album
Impressions, Chris Botti.
Compilation soundtrack album
Midnight in Paris, various artists.
Score soundtrack album
The Girl With the Dragon Tattoo, Trent Reznor, Atticus Ross.
Song written for visual media
Safe & Sound (from The Hunger Games), Taylor Swift, John Paul White, Joy Williams.
Musical theater album
Once: A New Musical, Steve Kazee, Cristin Milioti.
Producer of the year, classical
Producer of the year, non-classical
Mozart Goes Dancing, Chick Corea.
Adams: Harmonielehre & Short Ride in a Fast Machine, Michael Tilson Thomas (San Francisco Symphony).
Wagner, Der Ring des Nibelungen, James Levine and Fabio Luisi.
Life & Breath: Choral Works by Rene Clausen, Charles Bruffy.
Short-form music video
We Found Love, Rihanna featuring Calvin Harris.
Long-form music video
Big Easy Express, Mumford & Sons.
The Smile Sessions (Deluxe Box Set), Alan Boyd, Mark Linett, Brian Wilson, Dennis Wolfe.