I really am not doing a thing here. I just want to put it out there. This classic song wasn't completely written by Richie Valens. But it's not a cover. He took a traditional Mexican folk song and set them to a rock line - that he, at his very young age, wrote himself.
The song was to #22 on the pop charts in 1958. He died in February 1959, in a plane crash with Buddy Holly and The Big Bopper, aged 17 - so he was younger than that when he wrote this simple but perfect verse-chorus-verse rock song.
Now, what Los Lobos did when they took the song to #1 on the pop charts - THAT was a cover.