The Summer Sanitarium Tour was Metallica's packaged tour in 2000 & 2003.
 Taking place in "stadiums, arenas, and yes, even speedways," the tour was one of the top grossing tours of the year.
 It was also the final tour for long-time bassist Jason Newsted who quit the band in January 2001.
 Before the gig in Atlanta James Hetfield injured his back in a jet skiing accident and was forced to sit out three shows.
 Newsted sang most of the songs during these concerts, and the vocals and rhythm guitar were also taken by musicians from the supporting acts, such as Kid Rock and his guitarists Kenny Olson and Jason Krause, Serj Tankian and Daron Malakian of System of a Down, and Jonathan Davis of Korn.
All That Remains is an American heavy metal band from Springfield, Massachusetts, formed in 1998.
 They have released eight studio albums, a , and have sold over a million records worldwide.
 The group currently consists of vocalist Philip Labonte, guitarists Oli Herbert and Mike Martin, bassist Aaron Patrick, and former Diecast drummer Jason Costa.
 Labonte and Herbert are the only original members.
 In spite of this, the band's line-up had remained consistent from the release of 2008's "Overcome" until 2015's "The Order of Things", spanning four albums.
 This line-up changed, however, in September 2015, when long-time bassist Jeanne Sagan left the band, with Patrick taking her place.
Babá Ken Okulolo (born September 12, 1950) is a Nigerian bassist and bandleader who was first seen in the U.S. in 1985 with King Sunny Ade's world-touring band.
 He has played with renowned Afrobeat creator Fela Anikulapo Kuti, highlife master Victor Olaiya, and was a founder of the Afro-rock group Monomono in the 1970s.
 Now based in the San Francisco Bay Area, he leads four bands that represent his various musical specialties: Kotoja (an international Afro-funk band); the Nigerian Brothers (traditional folk music); the West African Highlife Band (highlife hits of yesteryear); and the Afro-Beat Connexion (modern Afrobeat collaboration with other African and American musicians).
 Babá Ken has also headlined such venues as Lincoln Center, The Fillmore, The Warfield, LACMA, the Oakland Coliseum, Yoshi's, The Greek Theater, and the Great American Music Hall.
Funk is a music genre that originated in the mid-1960s when African American musicians created a rhythmic, danceable new form of music through a mixture of soul music, jazz, and rhythm and blues (R&B).
 Funk de-emphasizes melody and chord progressions used in other related genres and brings a strong rhythmic groove of a bass line played by an electric bassist and a drum part played by a drummer to the foreground.
 Like much of African-inspired music, funk typically consists of a complex groove with rhythm instruments playing interlocking grooves.
 Funk uses the same richly-colored extended chords found in bebop jazz, such as minor chords with added sevenths and elevenths, or dominant seventh chords with altered ninths.
Jazz has been popular in Birmingham since the 1920s, an era when interest in the music within England was otherwise largely confined to London.
 The Birmingham Palais was one of the pioneering venues of British jazz and opened in Ladywood in 1920, hosting early touring bands from the United States such as the Frisco Jazz Band in 1920, Benny Peyton’s Jazz Kings in 1921, the Paramount Six and the Southern Rag-a-Jazz Orchestra in 1922, and Bill Shenkman's Buffalo Orchestra in 1923.
 The Palais also maintained its own resident bands that combined notable visiting American musicians such as Sidney Bechet and Emile Christian with emerging local musicians who would go on to establish the native British jazz tradition, such as Bill Harty, Billy Jones, Jack Raine, and Jack Payne.
Jonathan Howsmon Davis (born January 18, 1971), also known as JD and JDevil (or J Devil), is an American musician best known as the leading vocalist and frontman of the nu metal band Korn.
Philip Steven Labonte (Born April 15, 1975) is an American musician from Massachusetts, best known as the lead singer of the American heavy metal band All That Remains.
 Labonte is the former lead vocalist for Shadows Fall, was the touring vocalist for Killswitch Engage in early 2010, and also filled in for Five Finger Death Punch vocalist Ivan L. Moody in late 2016.
Korn III: Remember Who You Are is the ninth studio album by the American nu metal band Korn, released on July 13, 2010.
 Unlike Korn's following albums, the album was recorded as a four-piece band and using no Pro Tools or editing.
 Vocalist Jonathan Davis stated that the album is "simple" due to the absence of the multi-layered effect present in the band's other albums; Davis added that, the album is "about the vibe."
 The album features a return to their roots.
 The band hired producer Ross Robinson, who had produced Korn's first two albums, while drummer Ray Luzier was appointed a permanent member of the band (Luzier was formerly a "fill-in" drummer).
"Faget" is a song by the American nu metal band Korn.
 It is the sixth track from the band's self-titled debut studio album.
 The song is about how Korn's lead vocalist Jonathan Davis was bullied in high school for being into arts, wearing eyeliner, being into new wave music (for example, Duran Duran), and wearing frilly shirts.
 According to Jonathan Davis, he was constantly called names such as "faggot".
 Also, there was a rumor that Davis was gay.
 Jonathan Davis said he did not know if he was gay or not.
 Therefore, Davis tried to get in a relationship with another boy.
 However, Jonathan Davis disliked the experience, realizing he is not gay, even if people thought he was.
Commencement is the second studio album and major label debut by American rock band Deadsy, released on May 14, 2002.
 After initially being suspended upon distribution changes at Sire, the album was officially released through DreamWorks under the Elementree sub-label.
 It includes the single "The Key to Gramercy Park" which gained minor attention for its music video.
 Despite featuring various guest musicians and the support of popular industry figures such as Jonathan Davis and Fred Durst, "Commencement" was a commercial disappointment, and Elementree folded shortly after.

Question: What genre of music has American musicians Jonathan Davis and Philip Labonte both have in common in the bands they have played in?
Answer: metal