Why doesn't Justin Bieber smile as much as he used to?

I think Justin Bieber doesn’t smile as much as he used to, because he is no longer having fun and his job has become exhausting. Most of the music critics, that reviewed his “Purpose” concert tour in 2014 had nothing nice to say about his performances.

And when he canceled the last final fourteen dates of his 2017 world “Purpose” tour, he had already performed more than 150 shows in 40 countries across six continents. In May, 2016, Bieber said on Instagram, “It has gotten to the point that people won’t even say hi to me or recognize me as a human, I feel like a zoo animal, and I wanna be able to keep my sanity.”