I only have two achievements left to get: The one for playing one song from each decade since the '50s, and the one for playing 300 songs.
So I needed a song from the '50s. I went to the Music Store, and browsed be Decade. I selected "1950s", and a list of songs popped up. Johnny Cash and Roy Orbison. They didn't show any years in the song info, and I hate Johnny Cash, so I bought the Roy Orbison song, "Ooby Dooby".
I played it, and I didn't get the achievement. I was like WTF? So I went to my songs, and I looked at "Ooby Dooby", AND IT'S FROM 1987! I researched it, and sure, the original song was from 1956, but the version in the Music Store is from Roy Orbison's Greatest Hits album, which was released in 1987. It even says so in the song information IN THE GAME, but it doesn't say that when you're in the Music Store. So the Music Store straight-up LIED TO MY FACE and had the song listed under 1956...
I just wasted $2, and I will never get that $2 back!
DON'T BUY THIS SONG FOR THE ACHIEVEMENT! It's NOT from the 1950's, even though the Music Store says it is!