Kelly Osbourne, Hilary Duff and sister Haylie Duff partying in NYC

Kelly Osbourne, Hilary Duff and sister Haylie Duff partying in NYC

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on a roof filming 'Greta' in New Jersey (10/09/07)

Hilary Duff on set for her new movie "Greta" at the Jersey shore

Hilary Duff on set for her new movie "Greta" at the Jersey shore