What is "justincase"

Justincase is an American alternative- pop band from Charlotte, North Carolina, best known for their 2002 single "Don't Cry for Us", which was co-written by Michelle Branch, who was one of the band's early champions. Consisting of teen siblings Hannah, Justin, and Nick Tosco, the band was signed to Maverick Records. Justin is lead vocalist and guitarist as well as principal songwriter. Nick plays drums, and Hannah is on bass.