Erik Carlson is an American vocalist and musical theater performer known for his work with the Las Vegas-based vocal group These Guys Worldwide. His musical background includes training with the San Francisco Boys Chorus and San Francisco School of the Arts, performances with the San Francisco Opera and San Francisco Symphony, and an appearance at Carnegie Hall. After studying musical theater and jazz at California State University, Fullerton, he pursued independent music before joining These Guys Worldwide, whose repertoire spans Motown, jazz, pop, soul, funk, and classic rock. The group has performed aboard international cruise lines and at Las Vegas venues, with credits including the theme song for NBC's The Sing-Off and opening for comedian Louie Anderson.