What’s In Your Cleavage, Katy Perry?

We were hanging around and looking at pictures of Katy Perry's cleavage, like we do, and we noticed a little something sticking out from her grand canyon. What is that? Is it a receipt, a flower, the edge of her fancy bra, a note from an admirer, her napkin from dinner, or something we can't comprehend?

We normally consider ourselves experts on Katy's cleavage, but we are absolutely stumped. Lord knows that we have no problem studying the heck out of these pictures--we'd be doing that even if there were no answers to uncover. Thank goodness we have a purpose for ogling now!