Billy Joel now dating future wife number four?

Proving you can’t keep a good man down, just five weeks after separating from his third wife, Katie Lee, Billy Joel, it seems, is now finding solace  in the arms of a lady who may be wife number four — ‘Young and the Restless’ actress, Alex Donnelley (photo right).

60-year old Billy was introduced to the Hamburg-born actress by mutual friends while waiting backstage at his concert in Washington D.C. “They hit it off immediately,” a well-informed source told Page Six.

Alex, who at 49  is far older than Katie, who is just 27, was previously married to Chicago’s lead singer, Robert Lamm for six years, until their divorce in 1991. She has now been seen visiting Bill at his Sag Harbor home, and the pair were spied going boating and sharing hair-raising rides on some of the Grammy award-winning singer’s extensive collection of custom motorcycles.