Rhythmic Top 40 Number-One Hits of 2009 (USA) (Paperback)

High Quality Content by WIKIPEDIA articles! This is a list of the U.S. Billboard magazine Rhythmic contemporary number-one singles of 2009. Billboard magazine Rhythmic Top 40 number-ones of 1994. Billboard is a weekly American magazine devoted to the music industry, and is one of the oldest trade magazines in the world. It is often considered to be one of the 'holy grails' of the entertainment industry, and the official trade publication of the music industry; it is typically regarded as one of the most relevant and unbiased sources of information on the music industry. It maintains several internationally recognized music charts that track the most popular songs and albums in various categories on a weekly basis.