posted his first TikTok on Tuesday sporting gray hair, a full beard and thick glasses — causing several fans to call him a “silver fox.” The “Tearin’ up My Heart” singer posted the 11-second clip while tagging his former bandmates and asking if he was “doing this right.” “That’s really bright, give me this,” said Chasez before grabbing the phone’s camera. “OK, how’s this s–t work,” Chasez can be heard saying while the band’s iconic song “Bye Bye Bye” plays in the background.“Silver fox much?! Hot damn,” wrote one user. “JC went from teen heartthrob to silver fox and I’m here for it,” wrote another.