This past weekend, everybody industry-related was either in Toronto for All-Star Weekend or in LA for Grammy Weekend. As for Justin Bieber and Diddy, after they attended the 58th Grammy Awards, they hit up 1Oak in Los Angeles with French, Zack and a few other famous faces. While the Biebz was performing his hit-song “Sorry” for the packed club, Diddy decided to grab his mic from him and sang his own rendition of the tune. From the looks of it, Diddy looked SHHWAASSSSTEDDDD. However, the Biebz was not having it one bit.