If you caught any of Major Lazer’s frantic, fun-as-hell festival-rocking live shows over the last few years, you likely saw girls twerking on speaker-risers, Skerritt Bwoy performing death-defying feats of daggering, and Diplo perched behind his DJ table, looking vaguely bemused at the whole spectacle. But the Major Lazer that appeared last night on Late Night With Jimmy Fallon was a very different beast. Diplo, all suited up, played keyboard on the slow, sultry reggae song “Get Free” while Dirty Projectors singer Amber Coffman cooed on the mic, her bandmate Dave Longstreth held down guitar duties, and the Roots kept a beat behind them, everyone keeping calm and professional and holding a deep groove. But “Get Free” is a spectacular song, thrilling in its own quiet way, and this new incarnation of Major Lazer could do some major festival damage in its own right. Watch the performance below.