Sam Smith Rocked Disclosure's L.A. Show and Everyone Freaked Out

EDM duo Disclosure kicked off their arena tour in Los Angeles on Tuesday, and closed the show out in spectacular style when Sam Smith took the stage.
Smith, who was looking as svelte and stylish as ever, performed both of his collaborations with Disclosure -- "Latch" and "Omen" -- to the roar of a delighted crowd.

While Disclosure has also collaborated with Lorde and The Weeknd, Smith was the night's biggest special guest. But the whole evening was a star-studded affair. The American Express UNSTAGED show, which was executive produced by James Corden, featured a surprise appearance by Lion Babe with Talib Kwel opening for the EDM duo. 
Also, it's clear that the exercise and diet routine Smith's been on has been working great, as he's shown off on Instagram in recent weeks.
Recently, Smith released a new, brooding theme song for the upcoming James Bond film, Spectre, titled "Writing's On the Wall."
Check out the video below to hear a bit of the new track and find out why Smith is a little nervous for fans to listen to the new tune.