Kim Kardashian Busts Out Epic Cleavage Pic, Sports Matching Bangs With Kourtney Kardashian—See Photos!

Kim Kardashian reached a major personal milestone over the weekend and celebrated with a selfie...and what a selfie.

The pregnant Keeping Up With the Kardashians star posted on her Instagram page on Saturday evening a photo showing from the nose down, dressed in a halter top and showing massive cleavage, which is displayed prominently. She shared the pic to celebrate reaching 42 million followers. As of Sunday afternoon, she is at 42.1 million. She trails just behind Beyoncé, who is the most-followed celebrity on Instagram with 42.6 million followers.

Kim, 34, also busts out of another revealing outfit in another new pic, showing her with sister Kourtney Kardashian, 36. It is unclear when the photos were taken. They were posted hours after Kim shared selfies from sister Kylie Jenner's 18th birthday dinner, which saw mom Kris Jenner, 59, and ex Caitlyn Jenner, 65, reunite publicly for the first time in over a year and months after the Olympian's transition to become a woman.

In the pic, the two sport matching black wigs with bangs, Bettie Page-style, dramatic, dark makeup, including plum lipstick.

Kim is wearing a black vinyl outfit with a plunging neckline that ends several inches below her chest, while Kourtney is wearing a similar, retro-style look that shows less cleavage, paired with a leather, crystal-studded breast plate.

"Banger sisters," Kim said.

"Just a chill sister Saturday," Kourtney wrote.

Kim is pregnant with her and husband Kanye West's second child, a baby boy, who will join big sister North West, 2. Kim revealed in June that she has gained 15 pounds so far during her pregnancy. However, she is also trying to keep fit.

"Just hiked 2 miles!" she tweeted on Sunday. "I'm exhausted now. Need a nap!"