Miley Cyrus' parents aren't bothered about her smoking weed.

The 'Wrecking Ball' star, who has talked about using marijuana and supposedly lit up a joint on stage at the MTV European Music Awards this month, says her parent's aren't angry about her love of the drug and being photographed smoking.

A source told Perez Hilton: ''Before her performance on the UK 'X Factor', Miley confided to Nicole Scherzinger [judge on the show] that her mom, Tish, wasn't really upset about it. She said her mom is really liberal.''

And even her father, country star Billy Ray Cyrus, appears to be just as nonchalant about her recent controversial behaviour, which has included twerking on stage with 'Blurred Lines' singer Robin Thicke.

The source added: ''No father likes to see his daughter humping a man on stage or doing drugs. [But he] hopes it's just a phase.''

The 20-year-old's latest shocking stunt has been revealed on Twitter after she bleached her brown eyebrows blonde for a shoot with fashion photographers Mert Alas and Marcus Piggott, known as Mert and Marcus.

Miley partied with 'Hard Out Here' singer Lily Allen and model Miranda Kerr, who featured in the shoot this week, and the beauty posted a photograph of Miley's look on Instagram.

Many fans were left confused and asked: ''Why doesn't Miley Cyrus have eyebrows?''