Many people on Twitter and Instagram are sharing pictures of their personal “Transformation Tuesday.” MTV’s Leah Calvert has gone through many changes since she’s been on the youth-generated network’s hit show “Teen Mom 2.”

“Transformation Tuesday,” or #TT, is a pseudo-Holiday where users on social media platforms like Facebook, Twitter and Instagram share pictures of what they used to look like. Usually there are two shots, one each from the present and the past.

Calvert started the show when she was 16. Back then, she was still with ex-husband Corey Simms and was known as “Leah Messer.” Last name changes aside, all of the “Teen Mom” girls have undergone their own changes in the five seasons their series has been on television, but Calvert’s seems to be one of the most notable.

The reality star has gone from a teenager who was ungroomed and sporting braces to a blonde, sun-kissed bikini-wearing mother of two. There was even that phase when she had purple hair.

Calvert keeps viewers guessing with her looks, whether it is her latest hairstyle or (sometimes outlandish) makeover. Posted below are some pictures Twitter fans of the West Virginia mother have seen over the years.

Here’s the most up to date picture of Calvert, with her fellow “TM2” stars (R-L) Jenelle Evans, Chelsea Houska, Kailyn Lowry-Marroquin and then Calvert on the end. 

Teen Mom 2 Ladies "Teen Mom 2" stars, from right, Jenelle Evans, Chelsea Houska, Kailyn Lowry-Marroquin and Leah Messer Calvert. Photo: MTV

When she first became pregnant with her twins:

Here's a picture from when twins Ali and Aleeah were born: 


Calvert as a platinum blonde: 

When she first met husband Jeremy Calvert: 

When they welcomed daughter Adalynn:

That time she had bangs and "Teen Mom 2" was apparently going to be canceled: 

Calvert and her infamous purple hair, which Jeremy said he hated in the last episode of "Teen Mom 2":

Another picture of her and her family: 

Calvert on the most recent episode of "Teen Mom 2":

And her most recent haircut posted to Instagram: