Lyric discussion by missthing 

Cover art for Siren Song lyrics by Bat for Lashes

I think the end is more like:

"And the stars are exploding in your eyes It won't be long until you'll be running No, it won't be long until you're running And it won't be long until you're running And it won't be long until you'll be running Cause I'm evil (x2)"

I think she alternates between "you'll be running" and "you're running".