Miley Cyrus has been teaching her nine-year-old sister how to dirty dance. The 'Hannah Montana' star - who recently gyrated on stage at the Royal Variety Performance in Blackpool, UK, wearing only a tiny pair of leather hotpants while performing her hit 'Party In The USA' - can be seen in a video clip urging Noah Cyrus to perform a routine to Akon's 'Smack That' featuring daring shimmies and pats to her butt.

The 17-year-old teen sensation - who has recently said she is keen to appeal to a wider, more adult audience - is used to shocking her fans. Last year she appeared in a series of semi-nude photographs for US publication Vanity Fair and had to apologise afterwards when fans deemed them inappropriate. She said: "I took part in a photo shoot that was supposed to be 'artistic' and now, seeing the photographs and reading the story, I feel so embarrassed. 

Miley Cyrus added: "I never intended for any of this to happen and I apologise to my fans who I care so deeply about." In August this year she was also slammed for her dance routine at the Teen Choice Awards where she danced provocatively around a pole. Photo: Fame Pictures

Miley Cyrus: "Dirty, dirty dancing.. weeee!"