If you were to write a list of the most historically important rock songs, odds are Smells Like Teen Spirit would be in the top 10. As the vanguard of the grunge revolution, Nirvana's breakthrough hit set the stage for the reinvention of rock music in the '90s, and it remains an iconic example of the sound that shaped my childhood. And it all started with a drunken scribble on Kurt Cobain's bedroom wall.