Did Kim Kardashian West Get a Butt Reduction?

Paris Hilton and Kim Kardashian West were reunited at Kris Jenner's Christmas party over the weekend. 

Hilton captioned this Instagram photo, "Lovely evening celebrating the holidays with Kim Kardashian." 

According to "Intouch," fans were speculating Kim K may have gone under the knife. Her signature derriere looked significantly smaller in the photo.