Tony Bennett is 91. He's older than the talkie. He's older than packaged sliced bread. He's older than all of Fifth Harmony combined.And so it's no surprise he's got this performance thing down to a science. When he returns to the Mahaffey Theater in St. Petersburg on Friday (click here for details), he knows exactly what he wants to give the audience"I think from doing it so many years, you learn what to leave out and what to put in," Bennett says, breaking down his ageless show from his home in New York City. "It's very effective, because you don't waste anyone's time. It doesn't become boring. You just go right to where you get what you want to get to the audience."For more of our interview with Tony Bennett — which, um, didn't go quite the way we expected — click here.