Speaking of April Fool's jokes, Howard Stern got into the prank business himself on Thursday when fans tuned in to his morning radio show and discovered that the embattled shock jock had been replaced by the feel-good team of Cross and Lopez. The duo — who promised "fun without the filth" — aired a taped message from the station's general manager saying he had to take Stern off the air because of FCC pressure. The punking lasted about an hour before Stern returned to the airwaves.