of the years, mumford & sons took that for "babel." it's good to see something that's critical and commercial success win that award. >> and that band has a unique sound. and they've had a good year. so, good to see a little surprise winner. also taylor swift, she opened the show. how do you think that went? >> reporter: she did. and it was a good way to open the show. it was up-tempo. it was fun. there were clowns. there was fire. i think i saw tricycles going on. it was definitely a lot of fun and i think the people liked it. and it was a good way to open the show. >> jason, definitely a big performance by taylor swift. any other surprises for the night, huh? >> reporter: what i call the adele factor. you had a lot of stripped down performances. elton john, singing. rihanna did a soaring vocal performance. carrie underwood, just her