Older brother Kevin just got engaged, but 19-year-old Joe Jonas is back on the prowl, according to a representative for ex-girlfriend Camilla Belle. The 22-year-old actress' representative told JustJared.com that the pair "have broken up. There is no third party involved and they care deeply about each other and will remain just friends." Joe reportedly teared up mid-song at a Detroit concert last night and changed a song lyric about being "done with superstars" to "done with movie stars"—a replay of the way he dealt with his breakup with country music star Taylor Swift, who prompted him to croon about being "done with country stars." The pair had been dating since November.