Mikael Jansson/Calvin Klein Underwear

Kendall Jenner is in her skivvies again, and we love it!

The 19-year-old model's new Calvin Klein ads were just revealed, and not only is she topless in one shot, but she's also baring her bottom in a sexy black thong. Hence the tagline, "The Original Sexy"! Kendall posted the photos on Instagram and wrote, "little tease at the new @CalvinKlein underwear #MyCalvins," and the other shots show her perfect physique in lacy lingerie.

"Calvin Klein originated sexy and we’re going to reclaim, re-imagine and re-image it," Chief Marketing Officer of Calvin Klein Melisa Goldie said in a release. "We're bringing together a powerful mix of women from all over the world to celebrate our heritage as a leader in the intimates category." Good to know -- we can't stop staring at her amazing abs though!

On Tuesday evening Kendall returned home to Hollywood after spending the last week modeling in Paris, and she didn't want to chat about sister Kourtney Kardashian's split from Scott Disick. Seeing as Kendall and Scott have grown pretty close over the last year, this could be pretty awkward. From sexy selfies to lunch dates to partying together, the two have a pretty odd relationship...