Def Jam Recordings is an American record label, focused primarily on hip hop and urban music, owned by Universal Music Group, and operates as a part of The Island Def Jam Music Group. In the UK, the label takes on the name Def Jam UK and is operated through Mercury Music Group, while in Japan, it is Def Jam Japan operating through Universal Sigma Music.

Def Jam was created by Rick Rubin in his dorm room in Weinstein Hall at New York University and its first release was a single by his punk-rock group Hose. Russell Simmons joined Rubin shortly after they were introduced to each other by Vincent Gallo. The first single released with a Def Jam Recordings logo was T La Rock & Jazzy Jay's "It's Yours." The first releases with Def Jam Recordings catalog numbers were LL Cool J's "I Need a Beat" and the Beastie Boys' "Rock Hard," both in 1984. The singles sold well, eventually leading to a distribution deal with CBS Records (which would later become Sony Music Entertainment) through Columbia Records the following year. This created a short-lived subsidiary label called OBR Records, catered toward R&B artists — the first artist signed to that imprint was Oran "Juice" Jones, who enjoyed success with his hit single "The Rain". Def Jam also signed its first and only thrash metal band, Slayer, in 1986, and the band's debut album was one of only two Def Jam releases to be distributed through Geffen Records, as opposed to Columbia. As the decade drew to a close, the label signed Public Enemy, whose controversial lyrical content garnered the company both critical acclaim and disdain. Lyor Cohen became president of Def Jam in 1988, after winning a power struggle with Rubin, who would shortly thereafter leave the company to form Def American Recordings (now known as American Recordings). Rubin would take Slayer with him to Def American in its initial stages.

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.

Justin Drew Bieber ( /ˈbiːbər/ BEE-bər, born March 1, 1994) is a Canadian Pop/R&B singer-songwriter, musician, and actor. Bieber was discovered in 2008 by Scooter Braun, who came across Bieber's videos on YouTube and later became his manager. Braun arranged for him to meet with Usher in Atlanta, Georgia, and Bieber was soon signed to Raymond Braun Media Group (RBMG), a joint venture between Braun and Usher, and then to a recording contract with Island Records offered by L.A. Reid. Bieber's debut single, "One Time", was released in 2009 and peaked in the top twenty in Canada and charted in the top thirty in several international markets. His debut album, the seven-track EP My World, followed in November 2009, and was soon certified platinum in the United States. He became the first artist to have seven songs from a debut album chart on the Billboard Hot 100.