In the final days of his Forget Tomorrow world tour, Justin Timberlake has revealed that he was diagnosed with Lyme disease while on the road. "Well, as these two incredible years come to an end and I look forward to the future, I wanted to write something from the heart," he said in a lengthy Instagram post on Thursday."It's not an easy task to try to contextualize the whirlwind of touring-- but, I will try...," he continued.