and i can't stop now

there was this good song that played in the middle of spinning class. it has the lyrics

"and i can't stop now....no i can't stop now"

hearing the song got me going and so now i'm trying to find out who sings it. i can't find it! and yet the song is stuck in my head.

i heard there is a song search engine that you can sing your song and it will find it. i wonder if it's out of alpha version yet.