Tweens all over the world shed silent tears Wednesday at the announcement that Kevin Jonas, the oldest of the Jonas Brothers, is officially off the market after proposing to his long-time girlfriend at her home in New Jersey. The 21-year-old musician even helped design a 3-carat cushion-cut diamond engagement ring for Danielle Deleasa, a 22-year-old former hairdresser, saying, "[Deleasa] said 'yes, yes, yes' like 500 times super fast in a row" upon hearing the proposal. What's the reason for the rush to the altar? Probable Disney-produced movie deal aside, perhaps it has something to do with the JoBro's vow to stay chaste until marriage. "It's pretty rock and roll," Kevin said of the Tiffany promise ring he and his brothers each don. "It's getting banged up a little bit because of the guitar."