How can I change my username??

Two answers, really:

1) Stop using the first account and create a new one with the correct username. It's important that you stop using any previous account, as multiple accounts from the same computer will eventually get you banned from the site. Since there's also no way to delete an account, you have to settle for just not using the one with the "wrong" username.

2) Contact the Fanpop staff and see if they will accommodate you in changing your username.

Aside from that, there's nothing you can do.

I wanted to do it too and I think the only way to do it is to change your account remove your first account(there's a button located somewhere when you edit your profile, actually it's been a long time so I don't remember), then just make a new account with a correct username like Harold told...

Me too....I wasn't thinking when I put this username....I guess u could make a new account..?

who knows?