Who is this with Tyga?!

On Saturday the rapper jetted out of Los Angeles on a private jet and headed to Las Vegas, but not before giving a sexy mystery girl a very affectionate hug. We hope he wouldn't be stupid enough to pull a Scott Disick, but it certainly has us wondering!

Meanwhile Tyga's 18-year-old girlfriend Kylie Jenner cruised around Los Angeles in her brand new Rolls Royce, looking oh-so-fly: