Most Influential works of music 20th century

Ok, so this category is even more obnoxious than the others, but here goes. These can be albums, songs, jingles, any format:

St. Louis Blues - W.C. Handy
Rites of Spring - Igor Stravinsky
Crossroad Blues - Robert Johnson
In The Mood - Glenn Miller
Rock Around the Clock - Bill Haley and the Comets
Kind of Blue - Miles Davis
Sgt. Pepper's Lonely Hearts Club Band - The Beatles
Stairway to Heaven - Led Zeppelin
Rapper's Delight - Sugarhill Gang
It Takes a Nation of Millions to Hold Us Back - Public Enemy