On November 1, 1894 the first issue of Billboard magazine was published. 

logo for Billboard magazine
Billboard

Billboard is considered “the world’s premier music publication, Billboard has served the entertainment business since 1894. Beginning as a weekly for the billposting and advertising business, Billboard and its popular music charts have evolved into the primary source of information on trends and innovation in music, serving music fans, artists, top executives, tour promoters, publishers, radio programmers, lawyers, retailers, digital entrepreneurs and many others.” via Billboard.com 

The weekly magazine tends to feature a musician on its cover, along with an in-depth interview (e.g. Christina Aguilera)
Billboard