Justin Trudeau made waves on Halloween when he shared his shark costume online, which oozed inspiration from his girlfriend Katy Perry's Super Bowl XLIX Halftime Show performance.

Kay went as Martha May Whovier and wore a green tulle skirt with a strapless red top. She donned red gloves and had tiny gift boxes scattered throughout her hair. She held their newest addition, baby Sutton Blair, whom they welcomed on Oct. 7.

We’ve rounded up our favorite Halloween costumes from around the league for our first-ever power rankings costume contest.

Jenna Dewan and her kids are celebrating Halloween with another year of high-production costumes. Dewan is mom to daughters Everly, 12, and Rhiannon, 15 months, as well as son Callum, 5.