Gareth Michael "Gaz" Coombes is an English musician, best known as the lead vocalist and guitarist of the alternative rock band Supergrass. He first entered the music scene aged 14 as the lead singer of the band The Jennifers which featured Supergrass bandmate Danny Goffey.

Supergrass are an English rock band formed in 1993 in Oxford. For the majority of the band's tenure, the line-up consisted of brothers Gaz and Rob Coombes (keyboards), Mick Quinn and Danny Goffey. Originally a three-piece, the band was officially joined by Rob Coombes in 2002.