Last year, Fred Again.. sold out Madison Square Garden with Skrillex and Four Tet, and the other weekend he won his first Grammys. On Thursday, the UK DJ announced a surprise show at New York’s 3,200-cap venue Knockdown Center with Overmono just hours before it began. It predictably sold out immediately. During his set, Fred Again.. brought out Lil Yachty and the two debuted a new collaboration called “Stayinit.” Check out footage and photos from the rowdy night below.