Miley Cyrus teaches nine-year-old sister sister 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. 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.