M+M, also known as Martha and the Muffins, is a Canadian new wave band formed in 1977. They are best known for their 1980 hit single "Echo Beach", which became a significant success in the UK and Canada. The band, led by Martha Johnson and Mark Gane, is characterized by their eclectic style, blending elements of post-punk, synth-pop, and rock. Despite numerous lineup changes over the years, the distinctive vocals of Martha Johnson and the innovative songwriting of Mark Gane have remained a constant, defining feature of the band's sound.