By Nicola Fahey & Tatiana Krisztina Beyoncé will perform at the MTV Video Music Awards to mark its 40th anniversary this September. It’s a huge moment for the show, which hasn’t seen the Cowboy Carter star grace its stage since 2016 when she cleaned up with eight wins and performed a 16-minute Lemonade medley. Even having earned VMA nominations in 2018, 2020, and 2021, the 42-year-old still didn’t grace the show with an appearance and skipped last year’s to tour with Renaissance. “Beyoncé is a huge get for the VMAs and will be a huge ratings draw,” a source said, “She is currently figuring out…