"Kris Jenner and I sang 'Build Me Up Buttercup' on karaoke and took that picture," Jennifer Lawrence tells The New York Times of her cheeky birthday photo that popped up on Instagram

By Jodi Guglielmi
Updated August 27, 2015 10:20 AM
Credit: Courtesy Kris Jenner

When it comes to rowdy birthday bashes, Jennifer Lawrence‘s surprise-filled shindig sure takes the cake.

And what a cake it was.

The Hunger Games star opened up to The New York Times about her rollicking 25th birthday bash, spilling on how she ended up in bed with Kris Jenner and sharing details about a hilarious birthday cake that practically brought down the house.

“My two best friends planned a surprise birthday party with a big surprise within the surprise,” said the star, who copped to being a huge fan of reality TV – including Keeping Up with the Kardashians.

Just as her pals started singing “Happy Birthday” to the actress, “Kris Jenner comes out holding my cake, which is a pile of s—, with a sign that says, ‘Happy Birthday You Pile of S—.’ My knees buckled,” she recalled.

Lawrence was in so much shock, she said, that she literally fell to ground (something that has happened once or twice before).

“It was the closest I’ve ever come to losing consciousness,” she said. “I had no idea. I’d never met her before, but we’ve always watched Keeping Up With the Kardashians. And then Kris Jenner and I sang ‘Build Me Up Buttercup’ on karaoke and took that picture.”

That picture, of course, being the infamous Instagram posted by Jenner (and whose caption now snaps into focus after Lawrence’s cake story).

“Happy Birthday you piece of s—,” she captioned the Instagram. “God I love you #jenniferlawrence thanks for making this night a night to remember ..even if we did get caught I love you Happy Birthday Gorgeous!!!” Jenner wrote.

With Jenner and Amy Schumer already in mix, Lawrence is clearly on her way to forming the ultimate #squad.