Urth girls are easy!

Sexy teens Kylie Jenner and Pia Mia bared some skin when went to Urth Cafe in Beverly Hills on Friday. We aren't sure why they are holding hands -- but they definitely didn't seem shy about their friendship or shutting down rumors that Kylie was pregnant with Tyga's baby. The 17-year-old definitely made it a point to showcase her flat stomach!

For their attention-grabbing jaunt, Kylie donned a skintight black-on-black ensemble. Her 18-year-old gal pal Pia outfitted herself in white, complete with thigh-high grey boots. Of course, both decided to bare their midriffs in crop tops.

Earlier this week, the youngest Kardashian took to Twitter to shut down chatter that she was preggers. Kylie wrote, "People been thinking I'm pregnant for 8 months now... CLEARLY I'm not pregnant."

We're sure Blac Chyna is just loving that people think her ex knocked up a 17-year-old!