The track - a hyperactive hit-to-be - has had a significant boost already after appearing on the new Apple ad. It's the follow up to "Fuck They", their summer collab with Scissor Sisters' Jake Shears and Evermore's Jon Hume, and mixes big heart-pumping gestures with their sleek brand of house, Latin rhythms, and distorted electro.

"This song is a celebration of our favorite thing ever: friendship," say the pair, Sophie Hawley-Weld and Tucker Halpern. "It's about the kind of friendship where you can talk forever without anything in particular to talk about. Old friends, new friends, all friends! In the spirit of friendship, we just wanted to have some of our friends hop on a verse! We've been lucky enough to travel the world this past year and the best part of the journey is the friendships we have made and the friendships we have been lucky enough to revisit along the way. We (Soph and Tuck) have also become each other's best friend over the past few years, and we are so grateful to each other!"

"Best Friend" includes input from pals NERVO, The Knocks, and Alisa Ueno.

You can get "Best Friend" now from iTunes.