Watch John Mayer: Someday I'll Fly for Free: How to Stream the Movie Online at 123Movies. . John Mayer: Someday I'll Fly chronicles the musical evolution of one of the most influential solo artists of his generation. Featuring rare demos, interviews and live performances; it is told in it's entirety from Mayer's perspective. Centered mostly on his career and professional accomplishments, Someday I'll Fly strips away the typical gossip surrounding Mayer to provide an intimate look at the life and career of a lauded musician.