By Daniel Bird Jack O’Connell has leapt to the defence of his co-star Marisa Abela for her dedication to the role of Amy Winehouse in the upcoming film ‘Back To Black’. At the world premiere in London, O’Connell stated that Marisa knuckled down so hard” because they aimed to go beyond a mere imitation of the iconic singer. The star-studded event at the Odeon Luxe in London’s Leicester Square saw the cast, including O’Connell, Abela, and Eddie Marsan, who portrays Winehouse’s father, Mitch, come together to celebrate the film directed by Sam Taylor-Johnson. The movie delves into the stormy rela…