The Billboard Year-End chart is a chart published by Billboard which denotes the top song of each year as determined by the publication's charts. Since 1946, Year-End charts have existed for the top songs in pop, R&B and country, with additional album charts for each genre debuting in 1956, 1965 and 1966, respectively.
References
List of Billboard Year-End number-one singles and albums Wikipedia(Text) CC BY-SA