(Did you hear that? Somewhere in New York City, Madonna just blew a gasket….)

Move over, Madge. Kate Hudson is the latest Hollywood blonde reportedly letting Yankees slugger Alex Rodriguez slide into home plate.

Kate — who met A-Rod at the reopening of the Fontainebleau hotel in Miami Beach last November — was spotted “making out” with the third baseman after taking in a match-up at Yankees Stadium in the Bronx on Friday.

Spywitnesses blab to The NY Post: The real action came later that night at Mustang Grill on Second Avenue. Our source said a bartender at the Southwestern joint at 85th Street “was asking patrons not to go in the back room around 1 a.m. because A-Rod and Kate Hudson were back there making out.”

A chatty server also confirms that Kate and Alex enjoyed a night out together at the grill — although she denies seeing the two smooch.

Another tabloid tattle reports spying Kate, 30, positioned outside Manhattan’s glamorous 15 Central Park West, where A-Rod rents an apartment.