Question: Are Mike Ness and Oliver Sykes both lead vocalists of their bands?

Context articles: Social Distortion 2001 Tour
Live at the Hootenanny, Vol. 1
Social Distortion Winter 2012 Tour
Social Distortion
Bring Me the Horizon discography
Oliver Sykes
Mike Ness
Under the Influences
Shadow Moses (song)
List of Social Distortion band members

The Social Distortion 2001 Tour was a concert tour by Social Distortion.
 It was their first tour in three years as Mike Ness was busy with his solo project, touring throughout 1999 and the rest of the band was off doing their own thing.
 Dennis Danell was working as a producer in the Orange County area for up-and-coming punk bands and he was also in the process of recording demos for his side project.
 John Maurer had started his own side band as well, Foxy.
 Foxy had just released its debut album.
 On this tour, the band premiered new songs off of the Sex, Love and Rock 'n' Roll album like, "Footprints On My Ceiling", "I Wasn't Born to Follow" and "Angel's Wings" and "Road Zombie", although, "Angel's Wings" sounded almost different with different lyrics than its studio counterpart.
 They even played a couple songs that were rare to hear at a Social Distortion concert those days, "Hour of Darkness", "Backstreet Girl", "I Won't Run No More", "When She Begins", "King of Fools" and "Down On the World Again".
 This was also one of the few tours where Social Distortion did not have ANY opening acts.
Live at the Hootenanny, Vol.
 1 is a live compilation recorded at the Hootenanny Festival at the Oak Canyon Ranch, California in 1999 over the Fourth of July weekend.
 The concert features rockabilly bands like the Reverend Horton Heat, The Derailers, Mike Ness, and the Royal Crown Revue.
The Winter Tour (also known as "House of Blues Residency" was a tour by Social Distortion.
 As its name applies, most of the shows were based out of the House of Blues in Orange County (Anaheim, San Diego, West Hollywood) with a couple of shows heading out to Las Vegas and Tempe, Arizona.
 Even though similar, this tour was not a part of the Hard Times and Nursery Rhymes tour, as most of the material played here was pulled from most of the band's catalog.
 This is also not the first time Social Distortion has done a tour like this, it has been done before numerous times since 2001.
 As with previous House of Blues tours, the band played rare songs and new songs and brought out guests this time, such as Billy Gibbons and Mike Ness' own son Julian Ness.
 They also brought out Eric "Jailhouse Blues" Von Herzen who played harp for "It Coulda Been Me" and "Drug Train" on Social Distortion (album) and they also played ZZ Top's La Grange (song) with Billy Gibbons.
 The band also premiered songs like "Far Side of Nowhere", "Writing On the Wall" and performed songs that have not been played in a while like "It Coulda Been Me", "99 to Life", "Footprints On My Ceiling", "Hour of Darkness", "Diamond In the Rough" and even played the White Light, White Heat, White Trash album in its entirety at some shows.
Social Distortion is an American punk rock band formed in 1978 in Fullerton, California.
 The band currently consists of Mike Ness (lead vocals, lead guitar), Jonny Wickersham (rhythm guitar, backing vocals), Brent Harding (bass, backing vocals), David Hidalgo Jr. (drums), and David Kalish (keyboards).
The discography of Bring Me the Horizon, a British rock band, consists of five studio albums, two live albums, one compilation album, one remix album, two extended plays (EPs), one demo album, 12 singles, two video albums, 23 music videos and one other appearance.
 Formed in Sheffield in 2004 by vocalist Oliver Sykes, guitarists Lee Malia and Curtis Ward, bassist Matt Kean and drummer Matt Nicholls, the band released their debut EP "This Is What the Edge of Your Seat Was Made For" on Thirty Days of Nights Records in 2005, which reached number number 41 on the UK Budget Albums Chart.
 After signing with British independent record label Visible Noise, the group released their debut full-length studio album "Count Your Blessings" in 2006, which reached the top 100 of the UK Albums Chart and the top ten of the UK Rock & Metal Albums Chart.
 The 2008 follow-up "Suicide Season" reached the UK top 50 and charted in the US for the first time when it reached number 107 on the "Billboard" 200.
 In November 2009 an expanded version of the album titled "Suicide Season Cut Up!"
 was released, featuring remixes and videos.
Oliver "Oli" Scott Sykes (born 20 November 1986) is an English musician, best known as the lead vocalist of the band Bring Me the Horizon.
 He also founded the apparel company Drop Dead clothing.
 Sykes has also created the graphic novel "Raised By Raptors" with Drop Dead Clothing artist Ben Ashton-Bell.
Michael James Ness (born April 3, 1962) is an American guitarist, vocalist, producer and chief songwriter for the punk rock band Social Distortion, which was formed in 1978.
 Mike Ness' songs are represented by Downtown Music Publishing.
Under the Influences, the second (and most recent) solo album from Social Distortion's Mike Ness, is a compilation of country, rock, and bluegrass covers released just six months after his first solo effort, "Cheating at Solitaire".
 As the title implies, Ness intends the album to be an illustration of the music that shaped him.
 Songs as diverse as "I Fought the Law" and "Wildwood Flower" make their appearance, each with Mike Ness's unique spin.
 Included is a honky tonk version of Social Distortion staple, "Ball and Chain".
"Shadow Moses" is a song by English rock band Bring Me the Horizon.
 Written by vocalist Oliver Sykes, guitarist Lee Malia and keyboardist Jordan Fish, it was produced by Terry Date and featured on the band's 2013 fourth studio album "Sempiternal".
 The song was released as the lead single from the album on 11 January 2013, reaching number 82 on the UK Singles Chart and number 2 on the UK Rock & Metal Singles Chart.
Social Distortion is an American punk rock band which currently consists of vocalist and guitarist Mike Ness, guitarist Jonny "2 Bags" Wickersham, bassist Brent Harding and drummer David Hidalgo Jr..
 The band was formed in Fullerton, California in 1978, and originally comprised Ness, Rikk Agnew and his brother Frank on guitar, Casey Royer on drums, Tom Corvin on vocals and Mark Garrett on bass.
 The first lineup change took place in 1979, when Garrett was replaced by Dennis Danell, who had known Ness for years.