By Olivia B. Waxman
June 15, 2015

People in the New York City area have been tweeting about planes writing “Justin Bieber Is a Smileophile” in the sky on Sunday. What does it mean?

Maybe it is a publicity stunt. Maybe it is the work of some diehard fans. Maybe these diehard fans are trying to rehab his image after a streak of bad behavior made headlines.

Just watched some planes write Justin Bieber is a smileophile over downtown nyc. What even.

— Alexander Supertramp (@hushlaa) June 14, 2015

.@justinbieber is a #smileophile? Seen above NJ

— Jimmy Lee (@jjklee) June 14, 2015

It is a mystery.

Read next: Cursing Bill Clinton and 11 More Best Moments of ‘Bad’ Justin Bieber

Write to Olivia B. Waxman at


Read More From TIME