fiancée.
The 19-year-old singer celebrated his birthday at Hollywood's Shag nightclub
on Friday (12.15.06) with his twin sister Angel and new girlfriend,
18-year-old singer Kaci Brown.
And Aaron - who broke off his engagement to former Playboy Playmate Kari Ann
Peniche in September, just a week after he proposed onstage in Las Vegas -
insists after just seven days he is in love.
He told People magazine: "Now I'm in a great relationship. I've only known
her for, like, seven days, but I have a connection with her that's like
nothing else I've ever experienced. It's really amazing."

TMZ
Kaci - who opened for the Backstreet Boys on their 2005 summer tour - is
equally love-struck and has even introduced her new boyfriend to her
parents.
She gushed: "It was so funny - Aaron told them not to worry.
"He's just one of the sweetest most genuine people I've ever met. He's so
talented, it's inspiring."
Being a year older, Aaron revealed he has learned a thing or two about love
and believes the key to a successful relationship is trust.
He added: "Love shouldn't be about jealousy or anything like that. It should
be about commitment and being able to trust that person. If you can't have
that from the start, there's a problem. When it comes to relationships, I
think I'm pretty experienced - you'd be surprised."
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