“Circles,” released in 2011 as the lead single from If Not Now, When?, showcases Incubus’s evolution toward a more melodic and contemplative sound. Written by Brandon Boyd, Mike Einziger, Ben Kenney, Chris Kilmore, and José Pasillas, the song features warm acoustic textures, restrained percussion, and Boyd’s reflective vocals, creating a serene, introspective mood. Lyrically, it explores cycles of life, personal growth, and the passage of time, emphasizing mindfulness and self-awareness. Produced by Brendan O’Brien, “Circles” received positive attention from both critics and fans, highlighting the band’s ability to craft thoughtful alternative rock beyond their earlier, heavier style.