Jamie Sierota is an American musician and songwriter, best known as the guitarist for the pop-rock band Echosmith. The band gained popularity with their hit single "Cool Kids," which showcased their catchy melodies and youthful energy. In addition to his work with Echosmith, Jamie has contributed to various musical projects and collaborations. He is recognized for his talent in creating engaging music that resonates with a wide audience, helping to shape the modern pop sound.