Taylor Swift scoops Grammy for 1989 before main show begins
Taylor Swift has won a Grammy Award before even arriving at the ceremony.
The singer scored the best pop vocal album award for her critically acclaimed record 1989.
The award was handed out during a non-televised ceremony ahead of the main presentation, which will be broadcast live on American television.
The Recording Academy tweeted Swift's win, to which she replied in capital letters: "I am screaming."
Her collaborator Jack Antonoff collected her gramophone award with Swift on the phone.
The Bleachers singer tweeted: "1989 just won pop vocal album!!!! accepted it with t on the phone. albums made in small apartments win grammys. into it @taylorswift13."
Comedian Louis CK won the best comedy album Grammy in the pre-broadcast ceremony for his Live At Madison Square Garden recording while Ricky Martin won best Latin pop album for A Quien Quiera Escuchar.
Oscar-winning track Glory, by Common, John Legend and Che Smith, won the award for best song written for visual media.
Swift scored a second Grammy for best music video for her hit Bad Blood with Kendrick Lamar.
Swift is nominated for seven awards, while Lamar leads the pack with 11 nods.
Swift shared a video of her celebrating her win with her friend Selena Gomez, who also stars in the video. The pair appear to be in a dressing room getting dressed for the ceremony, with Swift wearing a white bathrobe while burying her face in her hands before embracing Gomez.
She captioned the video: "Bad Blood just won a Grammy for Best Music Video and we are not ok. @selenagomez"
The Amy Winehouse documentary Amy was named best music film.
Justin Bieber also scored a Grammy before arriving at the ceremony, winning the best dance recording award for his appearance on Skrillex and Diplo's track Where Are U Now.
The trio are due to perform the single during the ceremony.
Skrillex and Diplo won a second award when their album Skrillex And Diplo Present Jack U was named best dance/electronic album.
Canadian singer The Weeknd, who is nominated for seven Grammys, won best R&B performance for his hit Earned It, from the film Fifty Shades of Grey.
British singer Ed Sheeran won best pop solo performance for Thinking Out Loud while The Weeknd won another Grammy for best urban contemporary album for Beauty Behind The Madness.
British band Muse won best rock album for Drones and Mark Ronson and Bruno Mars picked up the award for best pop duo/group performance for their huge hit Uptown Funk.
Kendrick Lamar won three more Grammys for best rap performance for Alright, best rap/sung collaboration for These Walls with Bilal, Anna The Wise and Thundercat and best rap song for Alright with Pharrell, Kawan Prather and Sounwave.
British singer James Bay, who is nominated for three awards including best new artist, was one of the early arrivals on the red carpet in Los Angeles.
He told E!: "This is a huge honour, it's my first time here, the biggest and most famous red carpet in music."
Talking about his songwriting process, he said: "You have to go pretty honest, you have to bare all to get something real and something believable, something that people can feel and that moves people.
"Everything I've written songs about has something to do with my life, things I've experienced and been through, it can be a mad thing to keep a hold of and stay sane with and it can drive you up the wall."
Swift debuted a new bob haircut and flashed her midriff as she arrived on the red carpet with Gomez, dressed in a red bandeau top with a hot pink skirt and gold high-heeled sandals.
Gomez opted for a sparkly navy blue Calvin Klein gown with panels cut out at the midriff.
She told Ryan Seacrest on E!: "I wanted something that was simple and something I would do if I was going on a date. This is what I would do and my date is Taylor."
Actor Johnny Depp arrived on the red carpet with his Hollywood Vampires bandmates Alice Cooper and Joe Perry, who will make their TV debut as a band at the ceremony.
Depp told Seacrest the band formed organically, saying: "It sort of just happened, Alice was in Dark Shadows, we spent some time together and played together, Joe walked into the studio and said "I'm in"".
Cooper revealed the band will perform one original song and Motorhead's Ace of Spades as a tribute to the band's late frontman, Lemmy.
Cooper said: "Lemmy was the salt of the earth, everyone in the rock and roll world knew who Lemmy was, he was one of the guys, he drank himself right out."