Rogers said the 16-year-old "Hannah Montana" star dined on snow crab legs with a friend after wrapping up Monday's first day of filming of the Walt Disney Co. movie.
Then she got up and asked a local acoustic duo playing music if she could sit in. Miley stepped up to the microphone and strapped on a guitar to sing the Tim McGraw and Faith Hill duet "It's Your Love," then added a new song of her own.
"She played those and then we got her out of here," Rogers said. "We asked her, `What do you wanna do?' and she said `I want to get out of here.' So we walked her to a side entrance nobody knew about and got her in her car."
"The Last Song" will be filming on Tybee Island and in nearby Savannah until mid-August, stirring interest among locals and tourists alike. The movie features Cyrus as a teenage girl struggling with her parents' divorce who tries to reconnect with her father during a summer at his home in a quiet beach town.
The movie's publicist, Rachel Aberly, did not immediately return a phone call and e-mail message seeking comment Wednesday.
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