Kim Kardashian sure knows how to thank her fans [1]. The selfie queen hit 42 million followers on Instagram on Saturday, and in true Kim fashion, the 34-year-old celebrated the milestone with a sexy cleavage-baring selfie. The image shows off her famous assets, including her signature pout: "42 mil," she wrote in the caption.

The pregnant star has been on a roll with selfie hits lately. Kim shared a headline-grabbing selfie alongside Kris Jenner and Caitlyn Jenner [3] from their family night out on Friday, Aug. 7. Kim posed for the ultimate photo with Hillary Clinton and Kanye West [4] the day before. After you see her racy selfie, check out more of Kim's sexy Instagrams [5].