From the moment 'Saturday Night Live' first appeared back in 1975, it established itself as one of the most important musical venues in the nation. With just two short songs, up-and-coming singers and bands could create an entire career thanks to the buzz that would follow a memorable SNL debut -- performances that in many cases have since become legendary. And that still holds true today: if you're great on 'Saturday Night Live,' chances are you're going to make it big.

But what if you, you know... suck?