Chris Brown Lip Sync Disaster at the Billboard Music Awards

As many people are pointing out, it would be next to impossible to perform those kind of athletic dance moves and sing at the same time. I understand physics and biology, so yeah, I GET THAT. Doesn't mean I'm not going to add it to my ever-growing List of Chris Brown F-Ups, duh. (See: this, this, this, and this, and also this.)