Nick Lachey is an American singer, songwriter, and television personality, best known as the lead vocalist of the pop group 98 Degrees. The group gained popularity in the late 1990s and early 2000s with hits like "Because of You" and "The Hardest Thing." Lachey has also pursued a solo music career and released several albums. In addition to his music career, Lachey has appeared on various television shows, including the reality series Newlyweds: Nick and Jessica, which featured his marriage to singer Jessica Simpson. He has also hosted shows like The Sing-Off and participated in various entertainment projects throughout his career.