PHOTO: Kylie Jenner flashes her underboob in a tight bikini as she congratulates her friend with a birthday

Kylie Jenner shares some snaps on her social media. She congratulates her friend Yris Palmer with a birthday. Both of them posed in bikini.

Jenner rocked a blue tight bra which barely covered her curves and flasher her major underboob.

"Happy birthday to my bestie! The rarest and realest I love you so much!" she wrote.

Read also: Kylie Jenner pops up her humps in a bikini while lounging poolside.