you need permission from the song writer, the artist who performed (if they are the song writer then that's a plus) and, and permission from the record company
don't forget they will need money too
oh, and, since it's international you need to get the permission from the record companies in each country that the artist is associated with
so yeah... getting permission is not easy
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D