Madison Beer flashed her huge diamond engagement ring as she returned to the red carpet for the first time after NFL star Justin Herbert got down on one knee. The pop star, 27, has been dating the Los Angeles Chargers quarterback, 28, for around a year and announced their engagement last week. Madison looked happier than ever as she showed off her dazzling ring at the Variety Power of Young Hollywood 2026 event in Los Angeles. The American singer looked incredible as she put on a leggy display in a plunging green minidress which boasted a halter neckline and cinched waist. The Reckless songstress elevated her frame in a pair of white heels…