The teenager felt his proposal was too 'hasty'

Aaron Carter, who publicly proposed to his girlfriend on stage in Las Vegas a week ago, would like to take it back.

The pop star-actor has broken his engagment to former Playboy Playmate Kari Ann Peniche, reports Us Weekly.

"I got caught up in the moment and proposed," the 18-year-old tells the magazine. "I then realized it was a hasty thing to do and I am not ready for marriage quite yet."

An unidentified source close to the star adds, "They are just going to be friends now. She still wants to keep dating him but Aaron is not quite sure. He was trying to appease her but came to his senses and realized it was the wrong thing to do."

Carter proposed to Peniche -- the ex-girlfriend of Carter's older brother Nick of the Backstreet Boys -- at the Palms Casino Resort during the Playboy Comedy Tour on Saturday, Sept. 16.

Peniche was named Miss United States Teen in 2003 but later lost the title after posing nude in Playboy's November 2004 issue.

Carter will star in E!'s upcoming reality show "House of Carters" premiering in October. In the weekly series, Aaron, big brother Nick, twin sister Angel, and sisters Leslie and Bobbie Jean will move in together and plan their futures.

The Carter family has created its share headlines: mom Jane Carter's arrest on a battery charge; her bitter divorce from Bob Carter; at age 16, Aaron's peitition for legal emancipation from his manager/mother; Nick's arrest for drunk driving; and Bobbie Jean's arrest for assault.

Aaron Carter is also notorious for allegedly starting the celebrity feud between Lindsay Lohan and Hilary Duff by dating both of them back in the day.

Carter sold more than 1.5 million copies of his 2000 album "Aaron's Party" and released his latest album "Come and Get It: The Very Best of Aaron Carter" in January.

His acting credits include a guest stint on "7th Heaven" and roles in "Fat Albert," "Supercross," the direct-to-video "Popstar" and the indie "I Want Someone to Eat Cheese With."