The 25-year-old GRAMMY winner was noticeably slim, sporting a baggy white long-sleeve shirt and loose jeans at the fashion event.
Smith opened up to ET in February 2016 about his significant weight loss, admitting, “It's very very difficult. I love food so much so it's a constant battle. It's always going to be a battle but I'm trying my best."
And though he’s stayed out of the public eye this year, the British singer-songwriter has been active on social media, regularly posting Instagram updates to his 7.4 million followers.
In June, Smith posted photos from inside the recording studio to Instagram, teasing his new music.
Smith’s debut album, In the Lonely Hour, picked up four GRAMMYS. And though he’s collaborated on music since, including the Oscar-winning James Bond theme song, “Writing’s on the Wall,” he has yet to release a sophomore album.
WATCH: EXCLUSIVE: Sam Smith Talking About Weight Loss Is Incredibly Refreshing: ' I Love Food So Much!'
The new record is set to come out later this year.