Every era has its boy-band superstars who snare the hearts of an entire generation of female teens and tweens, but Kevin, Nick, and Joe Jonas took that phenomenon to a new level. The precocious kids from New Jersey conquered America via music, TV, and movies—their multi-media takeover was unstoppable. But it's important to remember they were real musicians—multi-instrumentalists and songwriters whose natural charm dovetailed with their talent.