The Best Fashion Instagrams of the Week: Serena Williams Gets in Formation!

Slaying with no apologies? This week Serena Williams did just that as she suited up for a guest-star appearance at Beyoncé's final Formation World Tour stop in New Jersey. The tennis champ suited up in a black frilled Dsquared2 leotard to reprise her role as Beyoncé's attention-grabbing backup dancer. Dropping it low in front of thousands of fans as she danced to Bey's "Sorry," Williams was unapologetically glamorous. And speaking of fashion without remorse, writer and photographer Ava Nirui p...