The two guys were also joined by Pixie Lott, who performed at the show.
“And what a show it was boys. Good times hanging! @florido: #formula1 fashion show in Monaco @justinbieber,” Kellan captioned a photo of the boys enjoying the event.
The night before, Justin looked super sharp for amfAR’s 2014 Cinema Against AIDS Gala held at Hotel du Cap-Eden-Roc in Cap d’Antibes, France.