Bruno Mars played MSG with Pharrell Williams on Tuesday.
Well-wishers backstage included Anna Wintour, who was seen chatting with Pharrell about fashion, Lenny Kravitz, who took the stage with Mars, Atlantic Records’ Craig Kallman and Platinum Rye’s Ryan Schinman.
Later, Mars raced downtown to a birthday party for his songwriting partner Philip Lawrence.
Spies said Mars arrived at Beauty & Essex in a black Adidas jacket, a white fedora and shades in time to sing “Happy Birthday.”