The singer was up for several prizes, including best pop vocal album for Justice and best pop solo performance for Anyone, and also performed an acoustic version of his track Peaches.
US singer and rapper Lil Nas X stepped out wearing pearls (lots of them), attached to an angelic white suit.
He was up for a multitude of equally shiny awards this year but ultimately walked away empty-handed.
Although he did treat the audience to an energetic medley of songs such as Dead Right Now, Montero and Industry Baby.
Another multiple nominee, Doja Cat, chose a one-shoulder, cerulean blue bodice with beaded detail for her red carpet look.
She had greater luck on the night, winning one for her collaboration with SZA.
UK pop sensation Dua Lipa was not nominated this year, so she was just on presenting duties but still dressed to impress.
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Lady Gaga arrived in a classy black number, which is tame by her standards at this particular event.
The star won best traditional pop vocal album for Love For Sale, her collaboration with Tony Bennett, and also put in an elegant and jazz-tinged performance.
Alt-rock band Japanese Breakfast were up for best new artist and best alternative music album for their experimental, cathartic record Jubilee. Frontwoman Michelle Zauner wore a yellow frilled Valentino Couture gown; while her nails were designed to look like the persimmons featured on her album cover.
A week after winning the Oscar for best documentary, The Roots drummer Ahmir "Questlove" Thompson picked up the Grammy for best music film for Summer of Soul - which captured the long-forgotten 1969 Harlem Cultural Festival.
Country star Carrie Underwood looked like a sunset, with a dusky yellow gown and bejewelled bodice.
Actress Laverne Cox posted for pictures in a sheer panel black dress, while sporting a possibly Prince-inspired purple rinse hairdo.
English singer and producer James Blake arrived smart-casual in a Dior shirt-jacket and chinos.
Producer of the year winner (and Taylor Swift's right-hand man) Jack Antonoff, scrubbed up well in a traditional suit and white shirt, but must have left his tie in the taxi.
The family of Chris Cornell - children Toni, Christopher and wife Vicky - were all in attendance, after the late Soundgarden rocker received a pair of posthumous nominations, including best rock performance for his cover of Nothing Compares 2 U.
Jamaican dancehall star and best reggae album nominee Sean Paul brought a bit of bling to the red carpet.