NOW THAT TAKES THE CAKE DEPT.:

Janet “Flasher” Jackson‘s pals ordered an eye-popping $600 cake for her surprise 38th birthday party — baked in the shape of two gigantic bare boobs! (Insert naughty joke here, folks. Mine is . . . Batter UP!) Janet never saw the cake, because the night before the bash, fiance Jermaine Dupri got wind of the party planners’ plot — and nixed their twinpeaks pastry prank. It was too late for another special order, so Birthday Grrrl’s last-minute substitute was a plain old sheet cake!