AFTER kicking her cop fiancée to the curb, shameless Rosie O’Donnell is eyeing openly lesbian actress and failed candidate for New York governor Cynthia Nixon — even though the Sex and the City star is MARRIED to another gal, insiders dish.

But sources say the TV talk show queen doesn’t mind being a homewrecker!

“Rosie has a history of breaking up her girlfriends’ relationships and then dumping them,” snitches an insider.

Sources blab Rosie, 56, has had a crush on the 52-year-old redhead for years and was brazenly hitting on Cynthia backstage at the hit Broadway musical The Prom last month.

Find out more in this week's GLOBE Magazine available at your nearest Wal-Mart, supermarket or newsstand!