Music is constantly evolving to become better and in some cases worse. Here’s a look back at the last four years of music.

Lady Gaga changed pop music in 2008 when she released “Just Dance,” and three years later she is one of the biggest artists on the planet. She continues to amaze everyone with her own style and annoyingly catchy dance music.

But music has had some awful moments too. Can you say “Friday”? Rebecca Black has disgraced music with her song, but even after millions of views, dozens of parodies and more dislikes than likes, she put out another song called “Prom”. Honestly there is nothing left to say about this very dark time in music.

On a lighter note, indie music has taken the lead in the music business. Bands like The Black Keys, Monsters of Folk, Edward Sharpe and the Magnetic Zeroes, Fitz and the Tantrums and TV on the Radio have all taken over the MTV airways and made their mark on music history. As hipsters become the norm and Toms become the most popular footwear, indie music has gained popularity all over the world.

Artists like Katy Perry, Kid Cudi and Justin Bieber also gained fame while we were in high school, so hopefully when you look back on high school you can say some of the music will bring back memories.