Piano man Billy Joel plans to check out of a chic rehab clinic today, his spokeswoman says.

"He's doing very well," said Claire Mercuri, his Columbia Records publicist. 

Joel checked into the Silver Hill rehab center in New Canaan, Conn., on June 17 for a 10-day stay. The 10 days are up today. 

Colleagues said the 53-year-old rocker was seeking help in battling both the bottle and depression — problems made more acute by the marriage of his ex-lover, Trish Bergin. 

The former Long Island News 12 anchor, who is 31 and pregnant, wed Southampton lawyer Randi Weichbrodt on June 4. 

A Bergin colleague said Joel's ex had been upset about his excessive drinking and about finding the singer in bed with another woman. 

Joel had begged for a second chance, showering her with Dom Perignon and flowers. She broke down in March 2001, after he sent her a photo of a $50,000 boat and a set of keys, but the reconciliation didn't last.

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