Im trying to make a new zune account with my xbox live account. do i just put in the gamer tag or the email?

trying to make my new zune account and use the microsoft points from my xbox live account but idk wat to put on for the part where to put in a email address or and xbox live account. but idk wat to put... the e-mail address or the gamer tag. which 1 is it?Im trying to make a new zune account with my xbox live account. do i just put in the gamer tag or the email?u have to put the email that's the best way to make a new zune account trust me