Michael Allan "Mike" Patton (born January 27, 1968) is an American singer-songwriter, multi-instrumentalist, film composer, producer, and actor, best known as the lead singer of the alternative metal band Faith No More. Patton was also the founder and lead singer of experimental band Mr. Bungle, and has played with Tomahawk, Fantômas, Lovage, The Dillinger Escape Plan, and Peeping Tom.

Known for his eclectic influences and experimental projects, Patton has earned critical praise for his diverse array of vocal techniques. VVN Music found Patton to possess the highest vocal range of any known singer in popular music, with a range of six octaves. He has many producer or co-producer credits with artists such as John Zorn, Sepultura, Melvins, Melt-Banana, and Kool Keith. He co-founded Ipecac Recordings with Greg Werckman in 1999, and has run the label since.

He is regarded as very hard-working. Faith No More keyboardist Roddy Bottum remarked about Patton "caffeine is the only drug he does", in reference to the Faith No More song "Caffeine" from the album Angel Dust, which Patton wrote while in the middle of a sleep-deprivation experiment.

Jean-Claude Vannier (born 1943) is a French musician, composer and arranger. Vannier has composed music, written lyrics, and produced albums for many singers. Vannier is regarded as an important musician in his native country; music critic Andy Votel noted his Eastern music influences and named him a pop-culture icon of 1970s France, alongside Serge Gainsbourg and Jane Birkin.