X is a noted punk rock band, formed in Los Angeles in 1977. While they achieved only limited mainstream success, they were widely considered one of the most accessible and tuneful of Los Angeles' many punk bands. Their landmark 1980 record Los Angeles resonated so loudly with the artisans of the city it is named after, that the band received an Official Certificate of Recognition from the City of Los Angeles in acknowledgment of their important contributions to Los Angeles music and culture.

X is an Australian punk rock band with a cult following, formed in Sydney in 1977 and led by the versatile and gifted Ian Rilen. The band has split and reformed several times.

X is the tenth album by British hard rock band Def Leppard, released in 2002. Much like 1996's Slang, it featured another musical departure from their signature sound by moving into the pop genre. It was produced by the band with Pete Woodroffe.

Released in 1990, X is Australian rock band INXS's seventh studio album. The title, the Roman Numeral for "10," represents the band's tenth year since their debut album was released in 1980. The album contained such hit singles as "Suicide Blonde," "Disappear," and "Bitter Tears."

"X" is the tenth album by Klaus Schulze.

X is the third album by British pop group Liberty X, released in the UK on November 3, 2005 via V2 Records. The album reached #27 on the national albums charts and spwaned three single with its tracks "Songs 4 Lovers", "A Night To Remember" and "X". The CD was re-released on June 19, 2006.

X is the third studio album by the brothers, K-Ci & Jo Jo. It was entitled X to mark their tenth anniversary. The album released on December 05, 2000.