Ask most bands whether having an iconic lead singer is a good or bad thing and they'll likely tell you that it's a little bit of both. On the one hand, having a strong, readily-identified presence behind the microphone can often be just the ticket to propel a given musical collective to the very heights of commercial triumph. On the other side of the coin, though, many of those same groups have stood by and watched helplessly as fan interest fell through the floor in the wake of their vocalist's departure.