Miranda Lambert: Worst
When the country singer dressed up as her favorite reality star, she had no way of knowing the future scandals that would cause "Honey Boo Boo" go bye-bye. While Lambert did an eerily good job of mimicking the beauty pageant winner, we have to put Lambert on our "worst" list because a Boo Boo costume is just in bad taste these days.
Katy Perry: Best
The pop singer scores a spot on our list of best celebrity Halloween costumes for originality. Perry's giant cheeto costume was creative and hilarious.
David Spade: Worst
Talk about unoriginal! Comedian David Spade dressed as a fox, referencing the popular YouTube video "What Does the Fox Say?" We're guessing every Halloween party will have at least one fox this year, and it seems Spade decided he wanted it to be him.
Paris Hilton: Best
A Miley Cyrus costume is pretty predictable, but Paris Hilton pulled off the skimpy outfit perfectly. We're not wowed by her creativity, but at least she looks good.
Julianne Hough: Worst
What was she thinking? Julianne Hough got lots of backlash for donning a "black face" to make her "Orange is the New Black" costume work. Big mistake.
Kate Upton: Worst
We love seeing Kate Upton in almost anything, but this costume just doesn't do the blonde beauty justice. Plus, we're not really sure what she's dressed up as.
Hillary Duff: Best
Young Mom Hillary Duff wore this adorable mouse costume to her friend's Halloween bash. We love the way she kept it appropriate-- but still sexy-- with her short T-shirt dress.
Sandra Bullock: Scariest
That's some pretty impressive face paint! Sandra Bullock went all out for her creepy costume, and we appreciate her effort.
Alessandra Ambrosio: Worst
Model Alessandra Ambrosio didn't seem like she was trying much when she went out with her family to celebrate Halloween, but she later made up for it with a more legit costume...
Alessandra Ambrosio: Best
Alessandra Ambrosio's second costume-- for her nighttime party-- is one of the best out there. It's a sexy, great portrayal of the queen from Alice and Wonderland.
Jessica Alba: Best
Stars dressing up as other stars: We like it! Jessica Alba was Cher for her Halloween party.
John Stamos: Worst
We were on the fence with this one, but we just think John Stamos could have come up with a better costume. Why not dress up as Elvis? He's never done that one before...
Slash and his wife Perla were creative-- and very creepy-- in their Halloween costumes.
Michelle Trachtenberg: Best
Actress Michelle Trachtenberg looked great as a... spider queen? Well, regardless, we like her style.