Kelly Osbourne defends friend Miley Cyrus

Singer Kelly Osbourne has defended Miley Cyrus after the latter was filmed inhaling smoke from a bong.

Osbourne insists her friend has learnt her lesson even though video footage showing the 18-year-old singer-actress inhaling smoke from a bong - a filtration device for smoking - was posted on the internet, reports Femalefirst.co.uk.

"This really makes me mad. Miley is one of the most hard working, respectful women I have ever worked with, I am learning a lot from her,” Osbourne posted on her Twitter account.

"Miley and I have become really close, I'm sick of all the haters judging her, she made one mistake and trust me she has learned her lesson," added Osbourne.

Osbourne revealed she decided to speak out after hearing rumours that her mother, Sharon Osbourne, was worried about Miley's influence on the 26-year-old star, insisting her new pal encourages her to lead a healthy lifestyle.

"Just read in the rags that apparently my mum thinks Miley is a bad influence on me, it could not be farther from the truth,” she posted.

"Actually it's the other way round, Miley has all of us on a health kick. Gym-early nights. There really scraping the barrel on that one!"