Question: Were Ronnie Van Zant and Mick Jones both lead singers of a band?

Context paragraphs:
Mick Jones (The Clash guitarist): Michael Geoffrey "Mick" Jones (born 26 June 1955) is a British musician, singer and songwriter best known as the lead guitarist, co-lead vocalist, cofounder and songwriter for The Clash until his dismissal in 1983.  Afterwards, he formed the band Big Audio Dynamite with Don Letts.  Jones has recently played with the group Carbon/Silicon along with Tony James and has toured the world as part of the Gorillaz live band.  In late 2011, Jones collaborated with Pete Wylie and members of The Farm to form The Justice Tonight Band.

Ronnie Van Zant Memorial Park: The Ronnie Van Zant Memorial Park is a public memorial park located in Lake Asbury, Clay County, Florida.  The park was built in memory of Ronnie Van Zant, vocalist of Southern rock group Lynyrd Skynyrd, who died along with numerous other band members and crew in a 1977 plane crash.  The park was funded by fans and family of the band, and features a number of facilities including tennis courts, fishing ponds, a disc golf course and picnic areas.

Johnny Van Zant: John Roy "Johnny" Van Zant (born February 27, 1959) is an American musician and the current lead vocalist of Southern rock band Lynyrd Skynyrd.  He is the younger brother of the late Lynyrd Skynyrd co-founder and former lead vocalist Ronnie Van Zant, and of the 38 Special founder, Donnie Van Zant.

Southern by the Grace of God: Southern by the Grace of God is a live album by southern rock band Lynyrd Skynyrd, this live concert was a tribute by Lynyrd Skynyrd to the members of the band who had died in the 1977 plane crash.  The plane crash killed frontman Ronnie Van Zant, guitarist Steve Gaines, backing vocalist Cassie Gaines and road manager Dean Kilpatrick.  This is the first album produced by the band after the '77 plane crash.  The band's lineup was re-worked into a second-generation Skynyrd.  The changes include: Johnny Van Zant, younger brother of Ronnie Van Zant, taking over on vocals, Ed King, who departed the band during a 1975 tour and Randall Hall, who replaced the paralyzed Allen Collins.  The three (King, Hall along with founding member Gary Rossington) re-form the famous triple-lead guitar attack of the original band.  New background vocalists Carol Bristow and Dale Krantz-Rossington were added to take the place of the original Honkettes.

Ronnie Van Zant: Ronald Wayne Van Zant (January 15, 1948 – October 20, 1977) was an American lead vocalist, primary lyricist, and a founding member of the Southern rock band Lynyrd Skynyrd.  He was the older brother of two other rock vocalists: current Lynyrd Skynyrd lead vocalist Johnny Van Zant, and Donnie Van Zant, the founder and vocalist of 38 Special.  He was the father of singer Tammy Van Zant, and cousin of musician Jimmie Van Zant.

Lynyrd Skynyrd 1991: Lynyrd Skynyrd 1991 is the sixth studio album by American Southern rock band, Lynyrd Skynyrd, and is the first album with the new members of the band - Johnny Van Zant and Randall Hall - and the first to feature Ed King since "Nuthin' Fancy", who replaced the three who had died since the band's last release - Ronnie Van Zant and Steve Gaines in the 1977 plane crash; Allen Collins in 1990 from chronic pneumonia.  This was the last album to feature drummer Artimus Pyle.

Van Zant: Van Zant is an American musical duo composed of brothers Donnie Van Zant and Johnny Van Zant.  Both are brothers of the late Ronnie Van Zant, former lead singer for the Southern rock band Lynyrd Skynyrd.  Johnny became the lead vocalist for the reunited Lynyrd Skynyrd in 1987, and Donnie was also the leader and vocalist of .38 Special.

The Ballad of Curtis Loew: "The Ballad of Curtis Loew" is a song written by Allen Collins and Ronnie Van Zant and recorded by Lynyrd Skynyrd.  The song was first released on the band's 1974 album, "Second Helping" and again on their compilation, "The Essential Lynyrd Skynyrd" and later on "All Time Greatest Hits".  It is on many of their compilation albums and before the Lynyrd Skynyrd plane crash, was performed once live on stage.  Ed King says, "The original version of the band only played 'Curtis Loew' one time on stage.  We were playing in a basement in some hotel and thought we'd try it.  We never played it again until the Tribute Tour with Johnny Van Zant."

Million Mile Reflections: Million Mile Reflections is the 10th studio album by The Charlie Daniels Band, released on April 20, 1979.  It is best known for the hit single "The Devil Went Down to Georgia".  The title refers to the band having passed the million mile mark in its touring.  The song "Reflections" is a tribute to Elvis Presley, Janis Joplin, and Ronnie Van Zant.  Daniels dedicated the album to Van Zant, who had died in October, 1977 in a plane crash.

Street Survivors: Street Survivors is the fifth studio album by Southern rock band, Lynyrd Skynyrd, released on October 17, 1977.  The LP is the last Skynyrd album recorded by original members Ronnie Van Zant and Allen Collins, and is the sole Skynyrd studio recording by guitarist Steve Gaines.  Three days after the album's release, the band's chartered airplane crashed en route to Baton Rouge, Louisiana, killing the pilot, co-pilot, the group's assistant road-manager and three band members (Van Zant, Gaines, and Gaines' older sister, backup singer Cassie Gaines), and severely injuring most who survived the crash.  The album performed well on the charts, peaking at #5 (their first top 5 album), as did the singles "What's Your Name" and "That Smell", the former a top 20 hit on the singles chart.

Supporting paragraphs: Ronnie Van Zant Mick Jones (The Clash guitarist)
Answer: yes