Singer Robbie Williams claims that he has encountered a UFO at least three times.

The 'Feel' star - who has previously battled drug and alcohol addiction - also says he'll quit his singing career to study aliens after his series' of extra terrestrial experiences.

robbie williams
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He said: "I'm stopping being a pop star. I'm going to be a full-time Ufologist."

Robbie, 34, also believes that the bizarre and highly controversial cult Scientology "exists" and reckons ghosts "are other worlds"

Former 'Take That' star Robbie insists that the first time he saw a UFO was when he was a kid in Britain. His second sighting was above a hotel in Beverly Hills.

He added: "I was lying on my sun lounger outside at night. Above me was a square thing that passed over my head silently and shot off."

Robbie also claims that the third UFO appeared as he stood on his bedroom balcony after writing a song about alien contact.

"This big ball of gold light turned up. On my life," he said.

Robbie based his 2006 Close Encounters concert tour on UFOs.

After claiming he also believed in ghosts, he said: "People will think I'm mental, which I am."