Jazz pianist Dave Brubeck, a towering figure in modern jazz, has died at the age of 91. Brubeck died of heart failure on his way to a regular medical exam. His Dave Brubeck Quartet put out one of the biggest selling jazz songs of all time: "Take Five," composed by alto saxophonist Paul Desmond. Like many of the group's works, it had an unusual beat -- 5/4 time as opposed to the usual 4/4. "Take Five" was the first million-selling jazz single.