Question: Tim Lambesis and Ian Brown both were what profession?

Context paragraphs:
Double Brutal: Double Brutal is the second full-length album by As I Lay Dying vocalist Tim Lambesis' parody project Austrian Death Machine.  Unlike the previous album, "Total Brutal", "Double Brutal" is a two disc effort; the first disc composed of original songs inspired by Arnold Schwarzenegger movies, and the second disc being covers of songs that can relate to Schwarzenegger movies.  Upon release, the album debuted at No. 105 on the "Billboard" 200.

Shadows Are Security: Shadows Are Security is the third album by American metalcore band As I Lay Dying.  The album was released on June 14, 2005 through Metal Blade Records, and was produced by Tim Lambesis, the band's vocalist, and Phil Sgrosso, one of the band's guitarists, along with Steve Russell.  A Limited Edition was released on June 23, 2005 with a bonus DVD of a show filmed at the Substage Club in Karlsruhe, Germany on November 28, 2004.  The CD was released again as a Special Edition on October 17, 2006 with a DVD on the making of the album and included videos of Confined, Through Struggle, and The Darkest Nights.  It also featured additional linear notes from vocalist Tim Lambesis on the concept of the record and little known facts on the making of the album.

Ian Brown: Ian George Brown (born 20 February 1963) is an English musician.  He is the lead singer of the alternative rock band the Stone Roses from their formation in 1983.  Following the split he began a solo career, releasing six studio albums, a greatest hits compilation, a remix album and 17 singles.  He has performed solo shows in 45 countries.  He returned to singing for the Stone Roses on 19 October 2011.  On 20 October, he put out a statement to say that although he had reunited with the band, it did not spell the end of his solo endeavours.  Brown is also known for a cameo role in "Harry Potter and the Prisoner of Azkaban".

As I Lay Dying (band): As I Lay Dying is an American metalcore band from San Diego, California.  Founded in 2000 by vocalist Tim Lambesis, the establishment of the band's first full lineup, which included drummer Jordan Mancino, occurred in 2001.  As I Lay Dying has released six albums, one split album, and two compilation albums.

Austrian Death Machine: Austrian Death Machine is an American metal side project from San Diego, California, founded by As I Lay Dying vocalist Tim Lambesis to be a parody of and tribute to Arnold Schwarzenegger's films.

Arise and Conquer: Arise & Conquer is the third full-length album by Christian metal band War of Ages.  The album was released on July 22, 2008 by Facedown Records.  The album was produced by Tim Lambesis of As I Lay Dying.  The band has released a one-minute clip of "Sleep of Prisoners" on their MySpace, as well as the song "Through the Flames".

Total Brutal: Total Brutal is the debut full-length album by Austrian Death Machine, a project of As I Lay Dying's vocalist Tim Lambesis.  The band and record are based upon Arnold Schwarzenegger and his movies.  Tim plays all of the instruments (apart from guest solo guitar work) and performs vocals but "Ahhhnold" is billed as the vocalist.  Destroy the Runner vocalist Chad Ackerman voices all of the Schwarzenegger impersonations.  The album was released on July 22, 2008.  On the cover of the original release of the album "Machine" was spelled with two 'i's, while new pressings of the album have the spelling corrected.

Destroy the Runner: Destroy the Runner is an American heavy metal band from San Diego, California, United States.  Tim Lambesis of As I Lay Dying managed them for their album "Saints", and did so again with Jason Rudolph for their second album "I, Lucifer".

Frail Words Collapse: Frail Words Collapse is the second studio album by American metalcore band As I Lay Dying.  The album is their first release on the record label Metal Blade Records.  Only two of the five current band-members (drummer Jordan Mancino and frontman Tim Lambesis) appeared on the album.  Two of the band's signature songs, "94 Hours" and "Forever", appear on the album.

Tim Lambesis: Timothy Peter "Tim" Lambesis (born November 21, 1980) is an American extreme metal musician, producer, and convicted felon, best known as the founding member and lead vocalist of American metalcore band As I Lay Dying.  He also had a solo/side thrash metal project in tribute to actor Arnold Schwarzenegger, Austrian Death Machine, in which he performed all the instruments.  He also formed a death metal band called Pyrithion and played guitar for Society's Finest and Point of Recognition.

Supporting paragraphs: Tim Lambesis Ian Brown
Answer: lead vocalist