Shortly after Kendall Jenner took to Snapchat to declare underboob her "ting" on Tuesday, her sister Kim Kardashian took to Instagram to challenge the claim with a super sultry selfie showing off hers.
Of course, there's no need for any sibling rivalry: It's safe to say all the Kardashian sisters have embraced flashing a little underboob now and then. As proof, here are just a few occasions where they totally rocked the look.
This article originally appeared on Cosmopolitan.com. Minor edits have been made by the Cosmo.ph editors.