After dating Ashley Greene, Taylor Swift and Demi Lovato for a while, Joe Jonas is now hooking up with Sports Illustrated model Nina Agdal. From the New York Daily News:

Joe Jonas has a new girlfriend. Sunshine State sources say the Jo-Bro was spotted with model Nina Agdal in Miami last weekend. The singer, 22, and the Sports Illustrated pin-up, 19, were first spotted looking cozy with Adgal’s leggy friends at Miami hot spots Mansion and LIV nightclub. The pair was also photographed together.

Hey, what happened to those promise rings? I bet it dissolved the first time Joe got some goo on it. That, or maybe a promise to stay celibate from a Jonas is the same as a promise to keep it classy from a Spears or a promise to stay clean from a Lohan: it AIN’T gonna happen.