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.

Timberlake, 44, opened up about his "debilitating" Lyme disease symptoms after coming under criticism for his tour performances.

"I've been battling some health issues, and was diagnosed with Lyme disease," Timberlake wrote. "If you've experienced this disease or know someone who has," he added, "then you're aware: living with this can be relentlessly debilitating, both mentally and physically."