Rick Springfield Goes Underground With His Biggest Hit
It all went down during rush hour -- around 8:00 AM -- Springfield whipped out his guitar out of nowhere for a flash mini-concert, belting out three songs for busy commuters ... including the classic "Jessie's Girl."
And as a testament to how awesome it was ... a massive crowd of New Yorkers -- who don't stop for anything -- actually gathered around to sing along. Check out the clip.
TMZ submitted this story.