August 31st at 9 am – Only on A&E’s PRIVATE SESSIONS - the legendary rock ’n’ roll band with horns is back with The Best of Chicago: 40th Anniversary Edition, and Robert Lamm, Lee Loughnane, James Pankow and Walter Parazaider sit down for an in-depth interview about their remarkable career. Plus, they perform their monstrous hits “25 or 6 to 4”, “Saturday in the Park”, “Does Anybody Really Know What Time It Is?”, “You're the Inspiration” and “Hard Habit