Miley Cyrus performs at Mitchel Musso's free concert at The Grove.
Los Angeles, California - 05.06.09

The pop star/actress, who is in the state shooting new movie The Last Song, showed up at Tybee Island's Stingrays with a guitar and treated locals to an impromptu set.

One song she performed was a new tune she had written, which she had scribbled on a piece of paper.

A diner says, "It was a break-up song."

Cyrus recently split from boyfriend Justin Gaston.

Source: WENN