Since most bands and artists on Facebook use Facebook pages, we designed Headliner.fm to connect to pages rather than personal accounts. This was fine for the majority of our users, but unfortunately artists who had personal accounts and no pages were caught in a bind. Sure, they could create a new Fan Page, but that account would start with 0 fans and they would be unable to leverage their existing fan base on Headliner.fm.
Luckily, that problem is now solved. Yesterday, Facebook released an update that allows users to convert their personal accounts into fan pages with a few clicks. More info here