Rock 'n' roll history was made 60 years ago when four music legends – Elvis Presley, Johnny Cash, Carl Perkins, and Jerry Lee Lewis – held an impromptu jam session at Sun Records in Memphis, Tennessee. It was Dec. 4, 1956. Perkins was at Sun Studios that day to record some tracks. Owner Sam Phillips brought in his latest talent, Lewis, to add piano to Perkins' songs. In the afternoon, Presley popped in with his then-girlfriend. Later, Cash arrived. What happened next was a casual, unrehearsed jam session, a rare moment in time when four of the greatest talents of early rock 'n' roll hung out as friends and played songs they loved. It would be the only time these four pioneers of rock 'n' roll – later dubbed the "Million Dollar Quartet" – would play music together. In tribute to this fantastic foursome, we're showcasing some of their greatest songs. Listen to classic Million Dollar Quartet recordings, then enjoy Cash, Presley, Perkins, and Lewis performing their biggest hits.