Mark Ronson brought out a ton of guests for his performance at the UK’s Glastonbury Festival today, but he really went went for it at the end. He closed with his inescapable smash hit “Uptown Funk,” and although Bruno Mars couldn’t be there, he had Mary J. Blige, Grandmaster Flash, and George Clinton — whom Ronson described as “the forefather of Uptown Funk” — to make up for it. Watch their performance below.