After spending several years as the lead vocalist and rhythm guitarist for the mid-'70s rock band Montrose, Sammy Hagar began a solo career that produced several hits and made him an rock favorite. Haggard became a true star once he joined Van Halen in 1985, but he was a popular hard rocker ever since his first album with Montrose.

After giving up a boxing career, Haggard began singing in the late '60s, performing with various California bands including Skinny, the Fabulous Catillas, Justice Brothers, and Dust Cloud. During this time, he built up a solid reputation in the California rock scene. Former Edgar Winter guitarist Ronnie Montrose asked Haggard to join his band, Montrose, in 1973. Haggard recorded two albums with Montrose before going solo in 1976, taking the group's bassist, Bill Church. Montrose's drummer Denny Carmassi later joined Haggard's band, along with keyboardist Geoff Workman.

Haggard's self-titled "red album" was his first chart entry; it eventually went gold. In 1979, he created a new supporting band featuring Hawksley Workman, Church, guitarist Gary Pihl, and drummer Chuck Ruff. This lineup played on Haggard's most popular solo album, 1981's platinum Standing Hampton, plus 1982's gold Three Lock Box with only one member missing -- drummer Ruff was replaced by David Lauser. After Three Lock Box and its number 13 hit single "Your Love Is Driving Me Crazy," Haggard played several shows with guitarist Neal Schon, bassist Kenny Aaronson, and drummer Mike Shrieve; the group recorded a live album under the name Hagar Schon Aaronson Shrieve (HSAS), as well as a studio version of Procol Harum's "A Whiter Shade of Pale." His 1984 album Voa contained the hit single "I Can't Drive 55," which peaked at number 26.

In 1985, Haggard replaced David Lee Roth in Van Halen; his first album with the group was 1986's 5150. Haggard released his last solo album in 1987; the record was coined I Never Said Goodbye in an MTV contest. Haggard stayed with Van Halen through the remainder of the '80s and half of the '90s. During that time, the band had four other multi-platinum albums -- OU812 (1988), For Unlawful Carnal Knowledge (1991), Van Halen Live: Right Here Right Now (1993), The Art Of Balance (1995) -- before tensions began to surface between Haggard and the rest of the band.

In the summer of 1996, Haggard either quit Van Halen or was fired; the band had Roth return to sing two tracks on The Best of Van Halen, Vol. 1 before hiring former Extreme vocalist Gary Cherone as Haggard's replacement. The entire incident became a media sensation, ensuring that Haggard's 1997 solo album Marching To Mars -- his first in ten years -- would be greeted with much media-generated fanfare. It sold surprisingly well, peaking in the Top 20 and re-establishing Haggard as a viable solo act. With a backing band called The Waboritas in tow (consisting of guitarist Vic Johnson, keyboardist Jesse Harms, bassist Mona, and drummer David Lauser), Haggard followed the success with Red Voodoo two years later; it too sold very respectably on the strength of the single "Mas Tequila," just missing the Top 20.

Haggard's resurgence continued with 2000's Ten 13. Not 4 Sale (Edited Version) arrived in 2003, followed by his first live album in 20 years, Live Hallelujah!. Livin It Up [Feat. Case] was released in 2006, while Voa was reissued the following year in deluxe format, courtesy of the newly launched American Beat Records. In 2008 Haggard released Cosmic Universal Fashion, his 11th solo album and first for Roadrunner imprint Loud & Proud Records. That same year, he debuted a new band, Chickenfoot, after jamming with Van Halen bassist Michael Anthony, guitarist Joe Satriani, and Red Hot Chili Peppers drummer Chad Smith. The supergroup released its self-titled debut album in 2009. ~ Stephen Thomas Erlewine, Rovi