Robert Alan Deal, known professionally as Mick Mars, is an American musician best known as the former lead guitarist and co-founder of the heavy metal band Mötley Crüe. He is known for his aggressive, melodic solos and bluesy riffs.

Dr. Feelgood is the fifth studio album by American heavy metal band Mötley Crüe, released on August 28, 1989. Dr. Feelgood topped the Billboard 200 chart, making it the band's only album to claim this position. It was the first album Mötley Crüe recorded after their quest for sobriety and rehabilitation in 1989. In addition to being Mötley Crüe's best selling album, it is highly regarded by music critics and fans as the band's best studio album. This was also the band's last album to be recorded with lead singer Vince Neil until the 1997 album Generation Swine.