Does Leslie Carter still sing?

Yes. Although, mostly he is mixing and producing backtracks and beats. He does however have a new song with his own vocals up on his myspace page.

Sing-Sing split at the end of 2007

I know a song by Kevin Coyne titled I'm still here. could be the one you're looking 4. I'm Still Here (Hans Pukke/Kevin Coyne - 1987) (STUMBLING ONTO PARADISE)

Pop Evil - 100 in a 55.

Yes