Justin Timberlake has a long road ahead as he grapples with Lyme disease , and RadarOnline.com can reveal the diagnosis has motivated him to change his ways – including a vow to save his rocky marriage to Jessica Biel .

"This illness has really changed Justin. His 'nothing can touch me' attitude is gone," shared an insider. Article continues below advertisement

Justin Horrifying Diagnosis Article continues below advertisement Article continues below advertisement

Timberlake revealed he had been living with debilitating Lyme disease throughout his Forget Tomorrow world tour, which wrapped July 30 in Istanbul, Turkey .

"I've been battling some health issues, and was diagnosed with Lyme disease... living with this can be relentlessly debilitating, both mentally and phy

See Full Page