Mötley Crüe is an American heavy metal band formed in Hollywood, California in 1981. The group was founded by bassist Nikki Sixx, drummer Tommy Lee and guitarist/lead vocalist Greg Leon. After some time, Leon was replaced by guitarist Mick Mars and lead vocalist Vince Neil respectively. Mötley Crüe has sold over 100 million albums worldwide. They have also achieved seven platinum or multi-platinum certifications, nine Top 10 albums on the Billboard 200 chart (including 1989's Dr. Feelgood, which is Mötley Crüe's only album to reach number one), twenty-two Top 40 mainstream rock hits, and six Top 20 pop singles. The band experienced several short-term lineup changes in the 1990s and 2000s; these included the introduction of vocalist John Corabi (who was Neil's replacement from 1992 to 1996) and drummers Randy Castillo and Samantha Maloney, both of whom filled in for Lee following his departure from Mötley Crüe in 1999; he returned to the band in 2004. More recently in 2022 guitarist Mick Mars announced his retirement from touring with the band, with former Marilyn Manson and Rob Zombie guitarist John 5 taking his place on live duties.

The members of Mötley Crüe have often been noted for their hedonistic lifestyles and the androgynous personae they maintained. Following the hard rock and heavy metal origins on the band's first two albums, Too Fast for Love (1981) and Shout at the Devil (1983), the release of its third album Theatre of Pain (1985) saw Mötley Crüe joining the first wave of glam metal. The band has also been known for their elaborate live performances, which feature flame thrower guitars, roller coaster drum kits, and heavy use of pyrotechnics (fireworks) (including lighting Sixx on fire). Mötley Crüe's last studio album, Saints of Los Angeles, was released on June 24, 2008. What was planned to be the band's final show took place on New Year's Eve, December 31, 2015. The concert was filmed for a theatrical and Blu-ray release in 2016.

After two-and-a-half years of inactivity, Neil announced in September 2018 that Mötley Crüe had reunited and was working on new material. On March 22, 2019, the band released four new songs on the soundtrack for its Netflix biopic The Dirt, based on the band's New York Times best-selling autobiography of the same name. The soundtrack went to number one on the iTunes All Genres Album Chart, number 3 on the Billboard Top Album and Digital Album sales charts, number 10 on the Billboard 200, and Top 10 worldwide. The autobiography returned to New York Times Best Seller list at number 6 on Nonfiction Print and number 8 on Nonfiction Combined Print & E-Book. Mötley Crüe embarked on its first major tour in seven years in the summer and fall of 2022, co-headlining a North American tour with Def Leppard.