Kim Kardashian announced on Twitter Friday that she and her husband Kanye West welcomed their fourth child via surrogate.

The tweet was simple: “He’s here and he’s perfect!” But also vague enough for the Twitterverse to pile on with the jokes. Wrote one wit: “when you open the front door at 1am and the photo was accurate,” while another opined: “When my cat comes to sit on my lap.”

Kim and Kanye confirmed in January that they’d be welcoming their fourth child together, and their second via surrogate. They were hoping to work with the same surrogate mom, but she was reportedly pregnant with her own child. The baby boy joins Chicago, 15 months, North, almost six, and Saint, 3. She has not yet shared their son’s name.

CHILL BABY

In celebration of the baby’s arrival in late April, Kim’s friends and family gathered for a CBD & Meditation themed baby shower.

Did the vibes pay off? According to a post she shared Saturday, the thus-far unnamed babes is pretty laid-back.

“We celebrated our baby boy about a week ago and now he’s here! He’s so perfect! Here are some pics of my CBD baby shower,” she wrote. “I was freaking out for nothing because he is the most calm and chill of all of my babies so far and everyone loves him so much.”

BREATHING CLASSES

Meanwhile, the star also addressed a minor scandal over her teeny-tiny waist (fans suspected she’d had ribs removed) on Instagram. She explained that in addition to wearing a corset to “train” her waist, she received “corset breathing lessons” from the acclaimed French couturier Mister Pearl to prepare.