Ether is the second track on hip hop artist Nas' 2001 album Stillmatic. The song was a response to Jay-Z's "Takeover" - a diss track from that rapper towards Nas which appears on Jay-Z's album The Blueprint, during the Jay-Z vs. Nas feud. Nas named the song Ether because, "I was told a long time ago, ghosts and spirits don't like the fumes from ether, and I just wanted to affect him with my weapon and get to his soul."

Ether is a diss song to fellow New York rapper Jay-Z, who had surpassed Nas in commercial success since 1998 and had dismissed him as a has-been on the diss track "Takeover." Nas responds to Jay's claims by rapping, "I got this, locked since Nine-One (1991), I am the truest/ Name a rapper that I ain't influenced." The song contains numerous gay-based slurs directed at Jay-Z: "When these streets keep calling, heard it when I was sleep/ That this Gay-Z and Cock-A-Fella Records wanted beef", "Then you got the nerve to say that you're better than Big/ Dick-suckin' lips, why don't you let the late great veteran live", "You a dick-ridin' faggot, you love the attention/ Queens niggas run you niggas, ask Russell Simmons" and "Put it together/ I rock hos; y'all rock fellas."

Michael Joseph Jackson (August 29, 1958 – June 25, 2009) was an American recording artist, entertainer, and businessman. Often referred to as the King of Pop, or by his initials MJ, Jackson is recognized as the most successful entertainer of all time by Guinness World Records. His contribution to music, dance, and fashion, along with a much-publicized personal life, made him a global figure in popular culture for over four decades. The seventh child of the Jackson family, he debuted on the professional music scene along with his brothers as a member of The Jackson 5 in 1964, and began his solo career in 1971.

In the early 1980s, Jackson became a dominant figure in popular music. The music videos for his songs, including those of "Beat It", "Billie Jean", and "Thriller", were credited with transforming the medium into an art form and a promotional tool, and the popularity of these videos helped to bring the relatively new television channel MTV to fame. Videos such as "Black or White" and "Scream" made him a staple on MTV in the 1990s. Through stage performances and music videos, Jackson popularized a number of complicated dance techniques, such as the robot and the moonwalk, to which he gave the name. His distinctive musical sound and vocal style influenced numerous hip hop, post-disco, contemporary R&B, pop and rock artists.

Shawn Corey Carter (born December 4, 1969), better known by his stage name Jay-Z, is an American rapper, songwriter, record producer, entrepreneur, and occasional actor. He is one of the most financially successful hip hop artists and entrepreneurs in America, having a net worth of over $450 million as of 2011.He has sold approximately 50 million albums worldwide, while receiving fourteen Grammy Awards for his musical work, and numerous additional nominations. He is consistently ranked as one of the greatest rappers of all-time. He was ranked #1 by MTV in their list of The Greatest MCs of All-Time in 2006. Two of his albums, Reasonable Doubt (1996) and The Blueprint (2001) are considered landmarks in the genre with both of them being ranked in Rolling Stone magazine's list of the 500 greatest albums of all time. Blender included the former on their 500 CDs You Must Own Before You Die.

Jay-Z co-owns the 40/40 Club, is part-owner of the NBA's Brooklyn Nets and is also the creator of the line Rocawear. He is the former CEO of Def Jam Recordings, one of the three founders of Roc-A-Fella Records, and the founder of Roc Nation. As an artist, he holds the record for most number one albums by a solo artist on the Billboard 200 with eleven. Jay-Z also has had four number ones on the Billboard Hot 100, one as lead artist.