After wrapping up his extensive "Forget Tomorrow" world tour, former NSYNC star Justin Timberlake got candid about his health struggles - namely, his recent diagnosis with Lyme disease. What is Lyme disease?

Justin Timberlake said he's "not doing s--- today" after wrapping up his two-year international tour, during which he was diagnosed with Lyme disease.

Justin Timberlake 's announcement that he was diagnosed with Lyme disease has put a spotlight on the condition that impacts nearly 500,000 people in the United States each year, according to the Centers for Disease Control and Prevention.