Well, it seems this big sis wasn't having any of it!
Koko took to Twitter on Monday with a very cryptic message about all the "sh*t", writing:
[Image via Instagram.]
B*tch stole her look!
Not only are they the two fittest and funniest Keeping Up with the Kardashians stars, but now they're both also the blondest!
But it's not just the hair that's an issue; apparently Kylie borrowed her Norma Kamali bathing suit right before she was going to get shot in it for her Strong Looks Better Naked cover!
Ch-ch-check out a sneak peek of KUWTK ahead of its premiere this Sunday at 9 p.m. EST on E! (above)!!!