"Everyday above ground is a blessing," Brielle, 22, captioned the sexy snap.
She left little to the imagination in a revealing red bikini.
"A literal goddess," one fan wrote in the comments section. "Oh my gosh ur so pretty and perfect I’m freaking jealous," another one chimed in.
Showing skin is nothing new for the Don't Be Tardy star.
Her assets were on display during many Los Angeles outings with sister Ariana two weeks ago.
Brielle showed a good amount of cleavage while leaving celeb hotspot Catch on Wednesday, July 17.
What are your thoughts on Brielle's risque outfits? Sound off in the comments!