Miley Cyrus celebrated her birthday in typically flesh-baring, Miley style.

The outrageous singer, who is increasingly known for shedding her clothes, went topless to celebrate turning 22, the Daily Mail reports.

Cyrus disrobed during a wild night at Factory Nightclub on Saturday (22 November), where she partied with fellow celebrities and new boyfriend Patrick Schwarzenegger, the son of Maria Shriver and Arnold Schwarzenegger.

The venue was reportedly festooned in sex toys and marijuana leaves. The Bangerz star was also seen riding a phallic-shaped mechanical bull and was videoed dancing with her top off.

Adam Lambert, Cody Simpson and Gigi Hadid were also spotted at the raucous party.

It's certainly not the first time the former Disney star has dared to bare all. She turned heads as she arrived at Alexander Wang's New York Fashion Week after party wearing nothing but ice cream shaped nipple pasties .

She famously stripped off for her Wrecking Ball video and regularly posts near naked selfies on social media.

And while she has clearly moved on from her break-up with her former fiancée, The Hunger Games star Liam Hemsworth, Cyrus's outrageous antics will do little to endear the star to her new boyfriend's family, who apparently disapprove of the relationship.

Miley Cyrus
Cyrus was photographed on a phallic shaped mechanical bull at her outrageous birthday party.Miley Cyrus / Instagram

According to Hollywood Life, a source said: "Maria Shriver disapproves of the relationship that Patrick is starting with Miley. She is so controlling when it comes to the image of the family and this is eating her up inside."

"She thinks they're not a good match," added the source saying Shriver "has very strong ideas about what Patrick should be doing with his life and who he should be spending time with and Miley does not fit that plan at all."

Rumours that Cyrus and Patrick are dating started first surfaced after the two were spotted together at Universal Studios Hollywood's Halloween Horror Nights with a small group of friends. The next day the duo was spotted hanging out at his Los Angeles apartment as well.

Patrick has previously talked about the former Disney star telling Details magazine in 2011: "My eye, though, is set on Miley."