Image Credit: Kevin Mazur/Getty Images for Liv Justin Timberlake revealed his Lyme disease diagnosis after wrapping up his Forget Tomorrow World Tour. In a July 31, 2025, social media statement, the "Sexyback" artist got candid about his health and explained why he was "reluctant" to share his journey with fans. Below, Hollywood Life is breaking down everything we know about Justin's condition and learn what Lyme disease is. How Old Is Justin Timberlake in 2025? As of July 31, 2025, Justin is 44 years old. He was born on January 31, 1981.