It's been less than two months since Audrina Patridge announced her pregnancy [1], but she's already got a tiny baby bump! The former star of The Hills [2] showed off her tummy in a new Instagram snap on Saturday. The post, which shows the mom-to-be standing in her bikini, is perfectly captioned, "For all of you girls asking me to show the bump here ya go!:).... Now this is a debut #selfie." The past few months have yielded a slew of good news for Audrina. Outside of her exciting pregnancy, she got engaged to longtime love Corey Bohan [3] and even showed off her stunning diamond ring [4]. We can't wait to see the little baby bump grow in the months to come!