Joaquin Phoenix is "pretending" to have a nervous breakdown. The star - who is filming a documentary about his transition from acting to hip-hop music - is apparently faking his recent public outbursts for the film, directed by "Gone Baby Gone" actor Casey Affleck.

A source told Entertainment Weekly magazine: "He said, 'It's a put-on. I'm going to pretend to have a meltdown and change careers, and Casey is going to film it.'"

Joaquin Phoenix reportedly "stormed out" before a Las Vegas concert after losing his cool with a film crew. The actor-turned-singer is believed to have been furious when Casey Affleck's camera crew - who are documenting Joaquin's transition into music - were late for his sound check at LAVO nightclub last week.

A source said: "He was waiting for Casey Affleck and when the film crew arrived late, Joaquin flipped out. Phoenix yelled at the crew, 'Thanks for being late and f***ing everything up.' He then threw a CD on the floor and stormed out."

Paul McCartney proudly declares he is a vegetarian. In a new People for the Ethical Treatment of Animals (PETA) ad campaign entitled "I Am A Vegetarian," the Beatles legend has strike a pose and dishes why he decided to stop eating meat.

In the ad, the 65-year-old rock royalty states: