Marshall Bruce Mathers III (born October 17, 1972), better known by his stage name Eminem/Slim Shady is an American rapper and record producer. Eminem learned his trade while growing up in Detroit, United States, and quickly gained popularity in 1999 with his major-label album, The Slim Shady LP, which won a Grammy Award for Best Rap Album. The following album, The Marshall Mathers LP, became the fastest-selling solo album in the United States history.
Gwen Renée Stefani (born October 3, 1969 in Anaheim, California, United States) is a singer-songwriter and fashion designer. Since 1986 she has fronted the rock band No Doubt, whose 1995 release Tragic Kingdom spawned the singles Just a Girl, Spiderwebs, and Don't Speak and propelled them into stardom with sales of 16 million copies worldwide. In 2004, Stefani released her first solo album Love. Angel. Music. Baby. The album featured several collaborations with producers and other artists, including No Doubt bandmate Tony Kanal, Linda Perry, André 3000, Nellee Hooper, and The Neptunes.