Billy Joel I May Be Crazy ... BUT Madonna Can't Sing!

1/29/2014 1:45 PM PST

Billy Joel -- I May Be Crazy ... But Madonna Can't Sing

Time to clear out the deli aisle ... because we got some BRAND NEW BEEF ... Billy Joel's now hopped on the Madonna-bashing bandwagon, firing shots at Madge for her crappy singing.

Billy skewered Madonna Monday night in NYC, during the first of his residency shows at Madison Square Garden.

He jokes about using a special spray to help soothe his throat before a song, and then says, "I saw Madonna use this once ... it didn't help her much." The crowd went nuts. You gotta listen.