Clarke Isaac Hanson is an American musician best known as a member of the pop rock band Hanson, which he co-founded with his younger brothers Taylor and Zac. He sings both backing and lead vocals and plays electric and acoustic guitar, as well as the piano, bass, and synthesizer. The band rose to international fame with their 1997 hit song 'MMMBop,' which earned them three Grammy nominations. Isaac and his brothers have continued to release music and tour independently for over two decades, cultivating a dedicated fanbase worldwide.