Mark is a somewhat ambiguous term in the music industry as it could refer to different artists. Assuming you are referring to Mark Foster of Foster The People, he is widely recognized for his unique blend of indie pop and electronic music. The band's biggest hit "Pumped Up Kicks," which was released in 2010, brought them international acclaim due to its catchy tune and thought-provoking lyrics. Mark Foster's signature sound often combines synthesizers, guitar riffs, and his distinctive high-pitched vocals, making Foster The People a significant influence in the indie pop genre.