Lady Gaga, Ariana Grande and Kendrick Lamar won the first Grammy Awards during the ceremony in LA.
Grande, who had withdrawn from the show at the ceremony, received the best pop album for Sweetener – her first Grammy Award.
"That's wild and beautiful" she tweeted, "Thank you very much."
Gaga won the best song written for visual media for the A Star Is Born title Shallow; and best pop single for the ballad Joanne.
Stars are still arriving for the main show, which starts at 01:00 GMT.
Among the first to enter the red carpet was Camila Cabello, who will later open the ceremony.
"The performance is based on my grandma's childhood, and I have my family in the performance," she said on the red carpet.
"I definitely have heavy butterflies."
The show will also include a tribute to Dolly Parton. The country star will be accompanied by Katy Perry, Kacey Musgraves, Little Big Town and Maren Morris.
"I just freaked out," Morris said before the show. "I met her and I was just trying not to quote Steel Magnolia's."
Other early awards included The Greatest Showman, who won the best soundtrack; and the best music video that went to Childish Gambinos arson This Is America.
Dua Lipa won her first Grammy for the Silk City collaboration Electricity, which received the best dance recordings. The British star is the best new artist later in the show.
"I'm so emotional," said the British star, who also expects the best new artist at the main ceremony. "I always try to take care of my make-up, it waters on the sides!"
Briton Ella Mai also won an early trophy – the best R & B song for summer hit Boo & # 39; d Up.
"I'm really trying to take on everything," said the singer, who was also nominated for the song of the year. "I've been dreaming of this moment since I was a little girl."
Is Quincy immortal?
Country star Willie Nelson won the best traditional pop vocal album for My Way at the age of 85. He is by no means the oldest Grammy winner. This award is given by Pinetop Perkins, who won the best traditional Blues album in 2011 at the age of 97.
Brandi Carlile and Kacey Musgraves swept the boards in their respective genre categories Americana and Country and brought them into the main category of the night – the album of the year.
Quincy Jones was honored for the Netflix movie Quincy in the category of best music films.
The award was accepted by his daughter Rashida Jones, who said, "When he saw the movie for the first time, he said," I wish I could live forever – and I think he might be the first to do that. I hope you do it. Father."
Kendrick Lamar and Drake are leading this year's nominations at eight and seven, respectively.
They are both on the album of the year along with Cardi B, H.E.R., Post Malone and Janelle Monae.
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