I havent any vocal loops on logic pro. its greyed out. How do i access this?

Have you downloaded the additional content?

Go to menu bar in Logic.. and under Logic Pro/Download additonal Content, you will find what you need to download there..

I have this problem as well. That added vocal loops but only classical/opera style loops. I for one an an EDM producer, so i don't find these useful. Any other way to download all of them?