A source tells Eye On LA that Backstreet Boys star AJ McLean has broken up with young singer Kaci Brown. “AJ and his girlfriend are broken up at the moment – but it’s always on-again, off-again, so you never know,” the insider revealed. “She’s only 18, so she doesn’t know what she wants; one day she wants one thing, the next she wants the opposite. It’s just so unfair to AJ – he’s ready to settle down and have a family, and she just wants to have fun. It’s not looking good.”

Kaci Brown posted more information about her rumored romance with soon to be 28-year-old Backstreet Boys star AJ McLean on her website’s forum earlier this evening. “There’s a thread in my forum just for AJ McLean. Definitely something to smile about ;p,” the 17-year-old writes. “Guys, please don’t be negative about something that doesn’t concern you personally. I’ve been a fan for as long as anyone else my age has been. *Go ahead, make age jokes* You have no solid proof of anything. And No, I’m not giving a solid answer. Everyone deserves to have respect from their fans/friends. If you don’t like me, but are crazy about AJ, respect him. It could be me, or any other girl. When he’s ready to tell the world who makes him happy, he will. Embrace the thought that he’s still single, unless you’re told by him otherwise. Oh wait, you were. I don’t mean to be rude, but every time I hear celebrity relationship gossip it seriously makes me sick. …. but point to be made, did anyone say that Joel [Madden] was a sick perv for dating Hilary [Duff]? A true fan of AJ’s, wouldn’t call him a sick perv for anything. p.s. thanks for everything Kev…. you make me laugh all the time.”