Ariana recently made things Instagram official with her new beau, Collin Lipman, with photos of the couple having fun at the fair and out to dinner in celebration of her 16th birthday on Tuesday.
Though Kim hasn't publicly commented on the romance, she knows all too well that her daughter is growing up — and fast. "Happy 16th Birthday to my princess @arianabiermann. I love you beyond words. You amaze me daily with how big your heart is and I couldn't be more proud of you!! You make my job as your mommy so easy, (most of the time) you make me laugh constantly, you are the BEST sister ever, You are so driven, focused, and kind," Kim gushed while wishing her daughter a happy birthday on Instagram Tuesday. "I could go on and on..... I'm so grateful that you chose ME to be your mom!! Please slow down ...this is going too fast! #HappyBirthdayAriana."
As for Ariana's older sister Brielle Biermann, she is still happily dating her baseball player boyfriend Michael Kopech.
Check out more Biermann family bonding, like that seen below, on Don't Be Tardy Fridays at 8/7c.