Way back in October 2001, Mamma Mia! burst onto Broadway, and the megahit musical is still attracting ABBA fans eight times a week at the Winter Garden Theatre. On May 31, the show celebrated a special milestone: its 4,000th performance on the Great White Way. After standing ovation number 4,000, the cast marked the occasion by giving every audience member a mini cupcake from Magnolia Bakery, then posed with the treats themselves. Congrats to all of our favorite Broadway dancing queens (and kings) at Mamma Mia!