Immigrant song is the perfect song.

School of Rock, released on April 9, 2004, put Jack Black in the shoes of a rock lover who, as luck would have it, ends up teaching at a high school, to later create a small rock band. In most of the film, the leading role is taken by different songs of important exponents of the genre to which the title of the film alludes, to name a few: "Bonzo Goes to Bitburg" by Ramones, "Substitute" by The Who, "Sunshine of Your Love" by Cream, among others.

 

The icing on the cake as Jack Black put it was the immigrant song by the well known band Led Zeppellin, a band also well known for not allowing their songs to be used in movies, yet Jack came up with the best way to address them to ask for the blessing he wanted:

 

 

Below is an excerpt of the song in the movie and the original: