Liam Hemsworth has come to the defence of girlfriend Miley Cyrus over a saucy video, insisting that she “has a good head on her shoulders”.

The teenage sensation, who shot to fame with her role in Disney’s Hannah Montana series, was seen in a raunchy video, showing her dirty dancing with a movie producer.

Miley has been dating the Australian actor since they met on the set of their film ‘The Last Song’.

And last week, a video from the movie’s wrap party sparked controversy, with footage of Cyrus showing her grinding up against a 44-year-old producer on the dance floor.

However, Hemsworth has insisted that his girlfriend shouldn’t let the media storm bother her, because the criticism is all part of being a star.