Listen to Charli XCX on iHeartRadio

Charli XCX

Charli XCX is known for breaking the rules, so we weren't surprised that the sassy songstress showed up to Madison Square Garden for iHeartRadio Jingle Ball hosted by Z100 in, well, basically nothing.

The "Boom Clap" singer worked the red carpet and the Vine snowglobe in a sheer négligée with fluffy pom poms covering her lady parts.

Check out the pics and video below and let us know what you think of Charli's barely-there look!

Photos: Getty Images

Hmm... where have we seen this look before? Oh yeah... #fembots

Photo: Everett Collection

See photos from Charli XCX's performance below!