They were childhood friends before he became famous. Mandy used to be close to the whole Jonas family. Joe wrote "Mandy" and "Underdog" about her. She has appeared in one of their music videos "I Wanna Be Like You" in a small part. They dated over the summer of 2005, and they remained as friends after the break-up. However, Mandy isn't friends with the Jonas family anymore.
She spoke about their split a few years ago: "Most high school relationships end disastrously, but ours didn't. We both realized that as much as we loved each other, we were better off as friends. I was in high school and he was touring and his career was just starting to take off, he needed a friend more than a girlfriend."