Modern Family‘s Eric Stonestreet went all out for his costar Jesse Tyler Ferguson’s birthday on Oct. 22. He arranged for the Boston Gay Men’s Chorus to surprise Ferguson onstage. Over half of the 195-member strong ensemble showed up on roughly three hours’ notice. The surprise starts at 2:30 in the video below. Following “Happy Birthday,” the chorus performs Katy Perry’s “Firework” (3:40). You can see why Ferguson is a recurring guest judge on So You Think You Can Dance — he picks up simple choreography quickly. His reaction at 6:00 when the guys get creative with “come on, let your colors burst” is the real reason to watch this. We won’t spoil it for you.