Robbie Williams is hunting for underwater aliens on a jet ski. The reclusive pop star is hoping to spot USOs, or Unidentified Submerged Objects, which have been spotted in the waters of Malibu, off the coast of California.

Robbie is quoted as saying: "I heard of these sightings at Malibu of things going into the water. I thought it would be quite exciting to be on a very small object very high over the ocean floor, knowing there might be something down there."

Noel Gallagher claims his brother Liam "always lands on his feet" while he "always lands on his a**e." The Oasis guitarist - who broke three ribs after being pushed over by a fan on stage in September - says his brother is the lucky one, while he bears the brunt of the band's bad fortune.

Speaking about the incident, Noel said: "I'm not jealous of Liam, but I can't understand why someone would get on stage and attack me and not him."

Robbie Williams once smoked a lump of rubber after mistaking it for cannabis. The reclusive star - who also claims he can roll a joint, a cigarette containing marijuana, with one hand while driving - admits he was duped by a drug dealer, but decided to try it anyway.

He said: "Once I bought a lump of resin and it was rubber from someone's shoe, so I smoked it anyway."

Nicole Kidman refuses to sing in front of her musician husband. The 41-year-old actress - who is currently filming musical movie "Nine" - is far too embarrassed to show off her voice in front of country music star Keith Urban as she is afraid he would mock her.

She said: "I will never, never sing in front of him. I wouldn't even play him the track of me singing. Sometimes I might hum in front of him but that's it. Keith is pretty tough with that kind of stuff. He's highly musical."

Robbie Williams says his drug paranoia once made him want to "stab himself." The 34-year-old British singer has revealed his first teenage experimentation with the drug LSD led him to hallucinate so badly he decided to hurt himself.

Robbie, who was 16 when his first acid 'trip' went wrong in his hometown of Stoke-on-Trent, said: "It was at Shelleys nightclub where I had my first acid experience. We were in Goldenhill in someone's kitchen probably. I was given a tiny piece of paper to ingest."

Robbie Williams and Rod Stewart came to blows over Rachel Hunter. Stereophonics frontman Kelly Jones claims the pair accidentally ran into each other shortly after Robbie started dating Rod's now ex-wife at the Sunset Marquis Hotel in Los Angeles.

Kelly said: "I was having a drink with Rod at the hotel, but while he was in the bathroom I saw Robbie Williams walk into the hotel reception and head through to the bar. When Rod came back I mentioned it in passing that Robbie was there without thinking."