Answer:
Waylon Jennings
Step-by-step explanation:
Waylon Jennings should have been on that plane, as a member of the Buddy Holly band, but he left his place to Big Bopper Richardson because this one had a flu and it would be better for him to fly than to make the cold long bus ride.
Ritchie Valens shouldn't have been on that plane either, he "won" his place in coin toss with another musician of band, Tommy Allsup.
That day became known as "The Day the Music Died", after the 1971 song "American Pie". It's a fact that that day changed the history of music.