"If you've experienced this disease or know someone who has — then you're aware: living with this can be relentlessly debilitating, both mentally and physically," Timberlake wrote. "When I first got the diagnosis I was shocked for sure.

Justin Timberlake has been diagnosed with Lyme disease, an infection caused by tick bites. See what stars like Justin Bieber and Bella Hadid have said about their experiences with the illness.

For more information on how to prevent and treat Lyme disease, please check out the American Lyme Disease Foundation's website. And to see which famous musicians have opened up about their struggles with the illness, - from Timberlake to Justin Bieber and more - keep reading below.