Random event on my iPhone calendar?

It's really weird there's just like this event on the 25th May saying Taylor Urias's birthday, and I definitely didn't put it there, I have no idea who that is! Every time I try and delete it it just comes straight back, it's really annoying! I don't sync my calendar to the computer or anything so it can't be that. Does anyone know what it is and how to get rid of it?

I don't know who that is… But I just stalked the f%£€ out of them.