Aaron Carter and Kaci Brown: One Week, One Heart

A lot can happen to Aaron Carter in one week.

The young singer was recently engaged for that period of time before calling off the wedding to Keri Ann Peniche.

Now, the House of Carters star has taken an entire seven days to fall head over heels for another foxy lady: Kaci Brown.

Carter, who turned 19 on December 7, celebrated his birthday Friday night at Shag in Hollywood with his twin sister, Angel. Brown, who opened for the Backstreet Boys during their 2005 summer tour, was on his arm. And in his heart.

"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," he told People magazine. "It's really amazing."

It sure is. This man bounces back faster than Britney Spears with J.R. Rotem.

Brown is a good friend of Angel's. Now that he's older - a whole 19 years old, in fact! - and wiser, Carter says he's learned a lesson or two about love.

"There's a lot of things I'm gonna change â€" me for one," he said. "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 get-go, there's a problem. When it comes to relationships, I think I'm pretty experienced â€" you'd be surprised."

Hey, Aaron, considering that your brother, Nick Carter, supposedly slept with Paris Hilton and Ashlee Simpson, nothing about your family would surprise us at this point.