Chet, an aspiring rapper, posted video from the show during Bieber's performance of "Where Are U Now," in which he sweetly wraps his arms around his mom.
"Bieber, baby," he smiles.
It's nice to see Chet looking healthy and happy again given that last September, the 25-year-old admitted to having a cocaine addiction in a string of revealing Instagram videos.
"A couple months ago I was selling coke [and] doing coke until I couldn't even snort it up my nose anymore because it was so clogged," he said, also revealing that he went to rehab. "I even smoked crack. If I can change, you can change. There is a solution."