There's a lot of ground substance in here, and the elastin fibers help it snap back into place, while the collagen helps anchor it so you can't, like, snag your skin on a zipper and watch it just fly off.
This is kinda like how stretching out a rubber band makes it snap back even harder, except that cardiac muscle is actively contracting whereas the rubber band is passively going back to its relaxed state.
Her first producer and later boyfriend, Rob Fusari, who witnessed the creative transformation, says that when he first heard her sing, it was like watching electricity bouncing off the walls.