Oh no! Kylie Jenner revealed on her Instagram Story that daughter Stormi was hospitalized on Sunday due to an allergic reaction: "Spent the day in the hospital with my baby. She had an allergic reaction but is 100% okay now and we are home. Nothing else matters when these things happen. God bless all the moms with sick babies. I’m sending so much love and positive energy your way."

Sounds like little Stormi's okay! Wonder what trigger the allergic reaction? Kylie does feed her baby sushi, so ... who knows ...

Meanwhile, Ky's sis Kim K was defending the Kylie Skin beauty mogul against haters (like us) who criticized Jenner's 10-second face wash in a promo video for her new skincare line. Pretty smart, actually -- Kim threw up a big-lip filter and asked fans what they'd do if they had ten seconds to use a skincare product while washing their face. Watch!