Robbie Williams out of rehab

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Robbie Williams is getting his life "back on track" after checking out of rehab. The 'Rudebox' singer says all is well following his recent stint at Arizona's Cottonwood de Tucson clinic, where he was treated for addictions to prescription drugs and caffeine.

Robbie checked into Cottonwood on February 13 - his 33rd birthday. He left almost a month later on March 3 and has since been seen looking well and partying in Los Angeles.

He says, "It's going really good. I got the train back on track. I've been sober since February 13 and look at me, I'm brand spanking new again."

Robbie, 33, also acknowledged that 'American Idol' judge Simon Cowell was right to tell him to "get a grip" when he entered rehab.

The star, who has lived in the US for two years, insists he does not want to be a success in America, because he enjoys the freedom that comes with his relative anonymity.