Celebrities get dressed up for Halloween (20 images)

Katy Perry took her love of Hillary Clinton seriously as she and a pal dressed up as the Democratic presidential nominee and her husband, Bill, while Nina Dobrev and Taylor Lautner channeled disgraced U.S. swimmer Ryan Lochte, as they and other celebrities partied for Halloween.

"Happy Halloween from Deadpool, a Cub Scout, Martha Brady, a space cadet, a granny with a lost cat, black swan, and a birthday girl dressed as a cat Happy birthday @kennedyrayee WE LOVE YOUUUUUU" Photo courtesy Taylor Swift/Instagram

---

---

Beyonce, Jay Z and Blue Ivy threw things back to the 80's with vintage Barbie and Ken costumes. Photo courtesy Beyonce/Instagram

---

---

Katy Perry is such a fan of Hillary Clinton, she dressed up as the Democratic presidential nominee - "Having a little pre party before I take office #IMWITHME Cheers to @svedkavodka #howtosvedka.@hillaryclinton" Photo courtesy Katy Perry/Instagram

---

---

Beyonce and daughter Blue Ivy, joined by grandma Tina Knowles, dressed up as Salt 'N' Pepa. Photo courtesy Beyonce/Instagram

---

---