Free Million Dollar...Quartet

In 1956 four of music's icons randomly got together and had an impromptu jam session. Fortunately for posterity's sake, they were at Sun Studios. The legendary studio recorded the legendary Johnny Cash, Carl Perkins, Jerry Lee Lewis and Elvis Presley as they played for a whopping 46 songs. Now it's a hit musical playing here in Chicago and on Broadway in New York and tomorrow night the cast of Million Dollar Quartet will be at Millennium Park's Pritzker Pavilion for a free concert.