They were once mortal enemies ... and now Kylie Jenner and Blac Chyna are joined at the hip, singing "I Don't F*** With You" at a Kardashian shindig.
Kylie, Chyna and Kim formed the girl group for Khloe's 32nd birthday party in Hollywood Monday night at Dave & Buster's.
As you know, Kylie's boyfriend, Tyga, is Chyna's baby daddy and the friction has been palpable, but apparently not any more.
Just as significant ... Kris Jenner was there, which means -- with Rob and Chyna's new show -- it's money making time.
Greenbacks are more potent than blood.
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