How can i find out someones lastname on myspace so i can send them a friend request?

i need to find out someones last name or email so i can send them a friend request this person now does not live in the same state and i know them but i i dont know there phone number either so i need to know a way to find out there email or last name without calling them or anything by the way i cant send them a message either cuase they got it set up too where i got to be there freind to send them a message plz help any help might hel thank you so much