Britney Spears wakes up Jimmy Kimmel in the middle of the night

When you hear a sound in the night, it's usually just the wind.

Whatever it is, it's almost never the sound of Britney Spears and a dance crew pranking you in your deep sleep -- unless you're Jimmy Kimmel.

After removing his mouthguard and rubbing the sleep from his eyes, Kimmel acknowledged the greatness of the prank on last night's episode of Jimmy Kimmel Live!