In a touching behind-the-scenes video from her MAC photoshoot, Vargas reveals an emotional story from her past that inspired her to put herself forward to become the face of the makeup brand.
"This has happened to me where I'm at a party and they're like 'oh let's take a picture'. And then they tell me, 'you take the picture'," she says.
"It hurts, because some people just think because you're overweight you don't have feelings."
Vargas tears up as she says: "But with this I'm going to prove to them.... Look I don't have a gorgeous body, I mean I don't think I'm beautiful, but look at where I'm at.
"I didn't need a gorgeous body. It was really the inside that counted and I don't need to be size 2, skinny. I'm here."
We whole-heartedly support Vargas's body positive sentiment, but there is one point on which we disagree: she is beautiful.
Vargas, from California, is the one of six winners in a contest created for MAC's new campaign MACnificent Me, which celebrates personal styles and beauty - both inside and out.
Speaking about the MACnificent photoshoot Vargas adds: "It feels so good, because I know there are so many women out there who won't express themselves for the fact that they're overweight.
"If I did it, they could all do it. I hope this helps someone out there who is just tucked into a room, doesn't want to go out or doesn't want to show themselves out."
Following on from our #LFW4All campaign HuffPost UK Style will continue to highlight moments of diversity and inclusivity in fashion and beauty - moments that include people of all skin tones, genders, sizes, shapes and personalities.
And we aren't the only ones with whom the video resonates. On YouTube the comments range from: "Yay finally MAC gets it right," to "she just made me want to buy that entire look. What an incredibly beautiful girl inside and out."
Vargas' sister has also commented on the YouTube video.
"This is my sister. She deserved this and I hope no one throws negative comments out there," wrote Maritza Vargas.
"We are so proud of her but as I told her 'you don't have to be on a cover, on a commercial or be modeling for worldwide product. We love you just the way you are'.
"This video was made for her to express her feelings when someone makes her feel bad about her weight (she feels left out).
"Its easy for some people to lose weight and for others its just so hard every human body is different and so unique in its own way.
"She did an awesome job. Give yourself a lesson and think twice before judging a book by its cover. We all come in different size and color."
Very wise words indeed.