All the girls looked ultra glam for the occasion and the birthday girl looked extra gorgeous in her white Michael Costello dress, which featured some side cutouts and a really low cut in the back. So low, in fact, that we got a glimpse of Khlo's tramp stamp, which we had totally forgotten about, because she literally never, ever shows it.
Back in 2009, Khloe lamented the location of the tattoo during an interview with Ryan Seacrest. "On my lower back, I don't like the location... I got a trendy location. It's called a 'tramp stamp,'" she explained.
The tattoo is a cross and angel wings and the word "Daddy" written above it, in honor of her late father, Robert Kardashian.
While she may regret the location, we know how that whole family feels about their father and we highly doubt she'll be visiting a tattoo removal place anytime soon. Although, she might want to consult with them about that one she has on her hand.