The Beatles’ sons just dropped a song together—and it’s way more than just “nepo baby” noise. Julian Lennon (John’s son), Sean Lennon, James McCartney (Paul’s son), and Zak Starkey (Ringo’s son) teamed up on a wild, psychedelic track with Mantra of the Cosmos, proving they’re not here to coast on their dads’ legacy—they’re here to create something new, loud, and unapologetically their own