Madonna DROPPED Onstage by Dancer at Celebration Show -- Watch Her Reaction

Madonna took a tumble at one of her Celebration tour shows Sunday night -- but the Queen of Pop bounced back with a laugh! At her second of two sold-out shows in Seattle, Madonna was seated in a chair singing her hit "Open Your Heart." One of her dancers, Daniele Sibilli, who was tasked with dragging the chair across a catwalk, stumbled in his heels, dropping the chair backward flat against the stage. The crowd audibly gasped at the unchoreographed moment! Madonna rolled over onto her stomach an...