20. "Hung Up" (2005)
Weeks before Madonna was scheduled to shoot the clip for the ABBA-borrowing lead single from Confessions on a Dance Floor, she had a horseback-riding mishap that resulted in her breaking eight bones. This didn't deter her from turning her section of the "Hung Up" video into a John Travolta homage. Wearing a long-sleeved pink leotard, she danced around a rehearsal studio with gusto in scenes culled from a three-hour shoot in which she had to frequently take breaks because she was in pain. "She was such a trooper," director Jonah Renck (a last-minute stand-in for David LaChapelle) told MTV News in 2006. "She just fell off a horse!" The rest of the video pays tribute to the idea of music as a unifying force, with restaurant employees, bus-stop congregants and parkour enthusiasts grooving to the sinuous track. "I kind of liked that we didn't have time to overthink this and be too clever," Renck said. "I like being out on a limb and not know what we're doing and why. Just deal with it, the mayhem, you know?"