Say you know you don't do love Never believing in commitment Say you're not the kind of guy I don't care about the words you say I don't really work that way Get you head over heels Heart beating out of your chest Guaranteed you were mine 'Cause you know I do it best Written all over your face You're switching places Make you feel just like a dream Like nothing you've ever seen I'll be your worst nightmare, your worst nightmare I'll be your worst nightmare, your worst nightmare Now I got you hooked on me You took the bait so easily I can see you catching feelings, oh 'Cause now you bought me flowers, babe I'm playing you at your own game Get you head over heels Heart beating out of your chest Guaranteed you were mine 'Cause you know I do it best Written all over your face You're switching places Make you feel just like a dream Like nothing you ever seen I'll be your worst nightmare, your worst nightmare I'll be your worst nightmare, your worst nightmare I'll be your worst nightmare, your worst nightmare Oh, I'll be your worst nightmare, your worst nightmare I, I, I will I, I, I, I will I, I, I will I, I, I, I will I, I, I will I, I, I, I will I, I, I will I, I, I, I will I'll be your worst nightmare, your worst nightmare I'll be your worst nightmare, your worst nightmare