While the rest of the Kardashians (plus Tyga -- ouch!) partied in Las Vegas to celebrate Scott Disick's birthday on Friday night, Kylie Jenner kept a low profile in Los Angeles over the weekend. We snapped the 18-year-old reality star grabbing ice cream in Calabasas, and she sported an oversize t-shirt and sneakers. How shockingly age appropriate!

Earlier in the week Kylie went on a date with her new flame, PartyNextDoor, and rumor has it her ex Tyga is fuming over their romance. Maybe that's why he decided to tag along with Khloe and Kourtney and company this weekend? We have a feeling Kylizzle isn't happy about that...

Meanwhile, Kendall touched down at Los Angeles International Airport, and while she didn't chat with photographers, she worked it as she breezed through the terminal and hopped in a chauffeured SUV.