THE teardrop which started it all

I looked at a strange girl in the middle of the crowd as me and my bandmates where performing on stage

I looked at her with curiousity as she stood out from the crowd as I continued to sing I kept my eyes on her as a tear fell from her mysterous eyes... she  slowly turned around and disappeared in the crowd...I had to focus and give my best for my fans but she was all I could think about ...

who was she??  why do I feel like I know her???  why was she crying???....is this what you call deja vu?