Taylor Swift Let It Go and Kylie Jenner's Toned Tummy: Here's How Hollywood Celebrated Halloween

Where else would you find the most adults enthusiastic for Halloween but in Hollywood. From the pop stars to supermodels and actors, Hollywood's bright stars went all out to show off their costumes in Halloween parties and on social media.

Here are some of the Hollywood celebrities who definitely had fun thinking about their costumes on top of actually donning it for the Halloween parties and events they were attending.

Of course, top of the list is Taylor Swift who decided to become Olaf and join Idina Menzel on stage as she sang "Let it Go" dressed as Elsa.

Next is Kylie Jenner who showed off her precious toned body in a revealing warrior costume, complete with a sword and back-up ninjas.

Colton Haynes went all out again this year as the sea witch Ursula from Disney's adaptation of "The Little Mermaid" and he is joined by "Arrow" co-star, Emily Bett Rickards, in her Sailormoon costume.

Jessica Alba pays homage to the 1997 Lisa Kudrow and Mira Sorvino comedy, "Romy and Michele's High School Reunion" as she and model friend Kelly Sawyer dressed up as Romy and Michele, complete with the claim that she invented post-its.

Kim Kardashian West played-up her self-deprecating humor when she dressed up as her most memed outfit and nailed "The Kim Kardashian" look.

Ellen Degeneres introduced herself as the lesser known Kardashian sister, Karla Kardashian.

If there's anyone you don't argue with, it's a muscled man in a tight costume. Dwayne "The Rock" Johnson got his fill of Spinach and dressed up as the classic cartoon character, Popeye. He was not too happy about the fit of his costume, though.

Of course, after an awesome celebration and, perhaps, a lot of singing, you have to end the night with a bang. Katy Perry did that dressed as a microphone as she became a literal mic drop.

Be sure to follow T-Lounge on Twitter and visit our Facebook page.