New Delhi, June 13 -- Pop sensation Justin Bieber is breaking his silence amid intensifying speculation over his mental health, marriage to Hailey Bieber, and recent cryptic social media activity. The 30-year-old singer fired back at online chatter with a pointed Instagram comment, telling concerned followers to "worry about yourself."

The controversy reignited after a meme account on Instagram shared a screenshot of a text from someone referred to as "Grandpa," reading: "I am worried about Justin Beber [sic]. There is so much heartbreak in Justin's life."

Bieber directly replied on June 10, commenting: "Worry about yourself gramps."

The caption quipped that "Grandpa thought about it for 24 hours," accompanied by the phrase "We all are...