Jay-z needs to watch more “Frasier.” At Monday night’s Audemars Piguet “Time to Give” event at the Four Seasons Hotel, the superstar jumped onstage to pump up the bidding on a watch signed by Kelsey Grammer. A spy reports, “Jay-Z accidentally called him Chelsea Grammer. Kelsey was there and just chuckled and shook his head.” But the rapper’s efforts didn’t go to waste: a Jay-Z-designed and signed watch went for $220,000.