Star’s alarming weight loss sparks concern on Twitter

There's no denying that Ariana Grande has drastically slimmed down over the last two years, but her appearance at last night's Grammys sparked fresh concern for viewers.

The 21-year-old took to the red carpet before last night's ceremony wearing a chic white Versace floor-length gown, but it was her alarmingly thin frame that had some people talking.

Many on Twitter were quick to comment on the fact that Ariana looked "scary skinny" and "too thin":

The Problem singer openly admitted in 2013 that she had been making a concerted effort to lose weight, opening up about her decision to her fans on Tumblr. "Yes, I lost a bit of weight last year. It's because I stopped eating junk food and started making healthy choices. I was happy with the way I was before and I'm still happy now! Just healthier!"

Although she was never overweight, it's clear that the former Disney Channel actress' shape has changed dramatically since 2012:

"The reason why I lost so much weight as I did is because I used to live on junk food," said Ariana. "So I drastically changed my eating habits, started excising daily, and I'm all around a healthier me… I just wasn't taking care of myself at all. I was making really poor choices… This is about making sure the foods you put in your body will nourish you and be put to good use."

We're glad to her that Ariana is taking a healthy approach, but we hope she's looking after herself too.