Justin Bieber is honoring a late friend.

The 21-year-old took to his social media accounts to pay tribute to Thomas Ayad, a Universal Music Group executive killed in the terror attacks at the Bataclan theatre in Paris on Friday.

WATCH: U2 Visits Memorial Site Near Paris Concert Hall, Bono Speaks Out: 'These Are Our People'

"Still thinking about Paris and my friend Thomas that we lost in the tragedy," Bieber wrote on Monday. "He was part of the team for years and I wish I would've had more time to thank him. Make sure to appreciate people while you have them. Thanks Thomas for everything you did for me. You are appreciated and missed. Thoughts and prayers are with your family & friends."

Ayad was named as one of 89 individuals killed in a mass shooting at the Eagles of Death Metal concert on Friday, the same day that Bieber released his new album, Purpose.

WATCH: Justin Bieber Breaks Down in Tears On-Stage After Paris Attacks 

Several artists canceled their scheduled performances in the wake of the attacks -- including U2 and the Foo Fighters overseas, as well as Coldplay in Los Angeles. Bieber did choose to continue on with his own album launch show at Staples Center in L.A., where he broke down in tears on-stage.

"Through all the pain and all the darkness, God, you still shine your light, God," he said in a prayer during the show.

For more on Bieber's emotional night, watch the video below.