Mumford & Sons pose with their awards for Album of the Year for "Babel" and Best Long Form Music Video for "Big Easy Express" backstage at the 55th annual Grammy Awards in Los Angeles, California February 10, 2013. [Photo/Agencies]

LOS ANGELES - Mumford & Sons wrapped up a completely unpredictable Grammy Awards with perhaps the most surprising win of the night, taking home album of the year for "Babel."

Even the London folk-rockers were shocked when Adele, who won the trophy last year, presented her countrymen with the award.

"We figured we weren't going to win anything because The Black Keys have been sweeping up all day, rightfully so," Marcus Mumford said.

Dan Auerbach of The Black Keys ended up the night's top winner with four trophies, including producer of the year and three rock category victories with bandmate Patrick Carney. But it was hardly a clean sweep as The Recording Academy's thousands of voters spread the love for the year's top singles.

Dan Auerbach (R) of the Black Keys performs with the Preservation Hall Jazz Band at the 55th annual Grammy Awards in Los Angeles, California, February 10, 2013. [Photo/Agencies]

Fun. took home major awards best new artist, in something of an upset over R&B singer Frank Ocean, and song of the year for the transcendent anthem "We Are Young," featuring Janelle Monae.

"I didn't think we were going to win this one," lead singer Nate Ruess said after the best new artist win. "Frank Ocean. The Lumineers. Everybody, amazing."

Presenter Katy Perry holds out the Grammy award for best new artist to Nate Ruess, singer from Fun, at the 55th annual Grammy Awards in Los Angeles, California, February 10, 2013. [Photo/Agencies]

Like Mumford & Sons, Gotye busted up the predictions, taking record of the year for 2012's top-selling single, the haunting "Somebody That I Used To Know," featuring New Zealand's Kimbra, and finished with three awards.

Prince, in hood and sunglasses and carrying a sparkly silver cane, presented him with the record of the year trophy and the Australian paid tribute to The Purple One's influence.

"A little bit lost for words, to receive an award from the man standing behind us with the cane," the Belgian-Australian Gotye said. "Many years listening to this man's music growing up and a big reason I was inspired to make music. Thank you."