But, did they just take their friendship to the next level and get matching tattoos?
"The girls are really close and have been spending loads of time together in the US. They wanted to mark this by getting tattooed with their initials," a source told the UK's Daily Star. "Cara had a K and a C, and Kendall a C and K, twirled round each other in old-style italic lettering." The ink is supposedly on their shoulders.
We know that Cara has a couple of tattoos, but her pal Kendall has only tested the water with temporary tattoos, courtesy of a friend she and Kylie Jenner have who does Sharpie tattoos, which by the way, look shockingly real.
Do you guys think Kendall took the plunge and got her first tattoo with Cara or do you think it's maybe another temporary tattoo?