AllMusic (previously All Music Guide or AMG; stylized as allmusic) is an online music guide service, owned by All Media Guide. AllMusic was founded in 1991 by popular culture archivist Michael Erlewine as a guide for consumers. Its first reference book was published the following year. When first released onto the Internet, AMG predated the World Wide Web and was first available as a Gopher site.

AMG headquarters is located in Ann Arbor, Michigan, United States.

AllMusic's database, which is licensed and used in point-of-sale systems by some music retailers, includes:

AllMusic also claims to have the largest digital archive of music, including about six million digital songs, as well as the largest cover art library, with more than half a million cover image scans.

The AllMusic database is also used by several generations of Windows Media Player and Musicmatch Jukebox to identify and organize music collections. Windows Media Player 11 and the integrated MTV Urge music store have expanded the use of AllMusic data to include related artists, biographies, reviews, playlists and other data.

William Leonard Roberts II (born January 28, 1976), better known by his stage name Rick Ross (often stylized as RICK RO$$), is an American rapper. He derived his stage name from the drug trafficker "Freeway" Ricky Ross, to whom he has no connection. Ross founded the record label Maybach Music Group, on which he released his studio albums Deeper Than Rap and Teflon Don, Ross was also the first artist signed to Diddy's management company Ciroc Entertainment. In early 2012, MTV named Ross as the Hottest MC In The Game.

William Leonard Roberts II was born in Coahoma County, Mississippi. and raised in Carol City, Florida, near Miami. After graduating from Carol City Senior High School, he later attended the historically black college Albany State University on a football scholarship.

After being signed to Suave House Records, former label for rap duo 8Ball & MJG, he eventually signed a deal with Slip-n-Slide Records, which has been under the Def Jam umbrella since 2006. While signed to Slip-n-Slide, Ross toured with fellow rapper Trick Daddy and made guest performances on other Slip-n-Slide albums.

Sufjan Stevens ( /ˈsuːfjɑːn/ SOOF-yahn; born July 1, 1975) is an American singer-songwriter and musician born in Detroit, Michigan. Stevens first began releasing his music on Asthmatic Kitty, a label co-founded with his stepfather, beginning with the 1999 release, A Sun Came. He is best known for his 2005 album, Illinois, which hit number one in the Billboard Top Heatseekers chart, and for the song "Chicago".

Stevens has released albums of varying styles, from the electronica of Enjoy Your Rabbit and the lo-fi folk of Seven Swans to the symphonic instrumentation of Illinois and Christmas-themed Songs for Christmas. Stevens makes use of a variety of instruments, often playing many of them himself on the same recording, and writes music in various time signatures. Though he has repeatedly stated an intent to separate his beliefs from his music, Stevens also freely draws from the Bible and other spiritual traditions, incorporating mystical elements into his music often.

Stevens was born in Detroit and lived there until the age of nine, when his family moved to Petoskey, Michigan. In Petoskey he attended the Petoskey High School, the prestigious Interlochen Arts Academy and graduated from Harbor Light Christian School. He went on to attend Hope College in Holland, Michigan and earned a Master of Fine Arts from The New School in New York City.