Robbie Williams says he 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.
He told Entertainment Weekly: "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.
He said: "I've met Simon a few times and I like him. He is usually right about things. He's probably right about that."
Robbie checked into Cottowood 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.
The star - who has lived in the U.S. 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.
He explained: "I decided four albums ago I like living here. I've got to the point where I'm famous enough to enjoy my celebrity and do fun stuff without all the crap that goes with it.
"And it would be insane to invite what I have in the rest of the world into this country. So I'm not going to bother promoting or releasing records here."
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