Once below ground, Britney and gang proceed to get the party started as the catchy, club-ready Euro-dance-esque tune kicks in. Britney's the only blond in the room and, of course, the center of attention as she gets up close and personal with her grungy troupe, gyrating in a black, then a red, skintight body suit.
Britney and her pals' plan to keep on "dancing till the world ends" seems to have a positive effect on the darkening world above ground. Before long, the suns comes up, the party slows, and Britney is able to poke her head out of the manhole and, presumably, return to the surface.
Our 21st century girl has saved the world through the power of partying!
Watch Britney Spears 'Till the World Ends' video.