Here's a funny little piece from College Humor, a sort of rap video (complete with language, hints of drug use, etc., so be warned) about Shredder throwing this party down at the Technodrome. All these robot characters begin to show up, and, well... see for yourself, as the Blue Bomber himself even puts in an appearance:
Funny... I always figured that at least Soundwave could rap, even if no other Decepticons can.
Source: Topless Robot