A lot has changed since Selena Gomez got her first big break at age 10 on the Disney Channel's 'Barney & Friends.' She's gone on to release two number one pop albums, star in several feature films, and launch her own fragrance and clothing line.

Now, at age 25, she is one of the world's biggest stars—as well as the most followed person on Instagram.

Instagram is also where you can find Selena modelling her latest beauty looks, courtesy of her makeup artist Hung Vanngo.

If you've been paying attention, then you've probably noticed this new vibe, which couldn't be more different to the "girl next door" image Selena cultivated as a teen.

But there's also something else about these photos that has got people talking (and writing to me, suggesting her for this column!). 

It's the question of whether Selena, like so many other celebs, might have cosmetically altered her face.

The only way to make an educated guess is to go back to her early days on the red carpet, and see how her look has evolved from past to present.

Selena in 2007

Aw, Selena was only 14 here! But you know what? She STILL has this cute baby face! 

Selena in 2008

It wasn't apparent in the 2007 photos, but you can really see it here—I'm talking about Selena's original nose! It seems even more prominent with her skinny brows, which were the trend at the time. 

Here's more glaring evidence—Selena was 16 by now—that she later underwent a rhinoplasty. The wavy hairstyle is way too "mature," don't you think?

Selena in 2009

In 2009, Selena rocked a bob for the first time (which she later returned to, in 2017). Is she adorable or what?! There are also a few fine highlights in her hair. Also notice her naturally thinner upper lip, and how her two front teeth are pushed forward.

Selena in 2010

By age 17, Selena's styling was becoming a little more grown-up. She grew out the bob and bangs—probably getting some help from extensions—and added oversized hoop earrings, although her makeup remained low-key. But she hadn't nailed her under-eye concealer yet; it's way too light.

Selena in 2011

Remember when everyone had these big sausage curls in their hair, circa 2011? Selena paired hers with white eyeshadow, visible lip liner, tons of lip gloss and body shimmer. As for her features, her nose definitely looks more prominent than it is today.

Selena in 2012

By the time she turned 20, in this photo, Selena finally had her red carpet style down pat. Notice her subtle, expensive-looking highlights; sleek, face-framing cut; and the flawless makeup. Her brows were also starting to grow out.

Selena in 2013

This look is probably my least favourite, due to the mask-like foundation and iridescent pink lipstick. But speaking of lipstick... see how her upper lip is actually fuller at the outer edges? That's an effect you often see from lip fillers! I think there's also a chance she may have altered her nose by this point.

Selena in 2014

The following year, Selena experimented with more dramatic makeup, like these exaggerated cat eyes, extra-long lashes and baby pink lipstick. Her au naturel brows have grown out nicely, and I don't think she touched her nose and lips... yet.

Selena in 2015

One thing I've noticed time and time again with celebs—they often step out with a dramatic new look to distract us from recent cosmetic procedures! Is that what is happening here with Selena? I think it might be, thanks to her jet-black hair, false lashes and coloured contacts. Underneath it all, her upper lip is a little fuller and her nose is perhaps more button-like.

Selena in 2016

Next, Selena kept her long, straight layers but lightened up to this rich brown colour. She also continued with the heavy eye makeup. Looking at her nose front-on, her nostrils do seem narrower, with an angular tip.

And here's another example, with a lighter touch on the makeup. Yes, there could be a little contouring going on, but I still don't think that accounts for Selena's new look. There's a newfound balance to her features that she didn't have in the 2008 and 2009 shots.

Selena in 2017

Here, Selena was 24, and made a bold statement with pink eyeshadow and a long bob cut. Her brows made an amazing recovery and are super-full now. The same goes for her upper lip, even though she is smiling! That didn't happen when she had a similar expression in 2008—indicating fillers. Surprisingly, it doesn't seem like she has opted for any cosmetic dentistry for her two front teeth.

Selena went blonde! This was the other red carpet look that recently generated major buzz. It works because she kept her roots and brows dark, and the rest of the styling is edgy yet fresh. As for her lips, they're looking bigger than ever. Even her Cupid's bow has disappeared, which happens when people over-inject!

Selena in 2018

That brings us to 2018, and Selena's latest red carpet appearance. After her brief stint as a blonde, she went back to brunette, keeping the shorter length and soft waves. Her upper lip is super-plumped... and her face in general seems a bit fuller than before. I seriously doubt she's putting fillers in her round face, though, so it's likely a side effect from her recent kidney transplant. 

Selena Gomez Before and After

If you compare Selena's features a decade ago to now, it's obvious that her new look isn't just from her talented makeup artist.

I'm suggesting that she probably had at least one rhinoplasty surgery—which shouldn't surprise anyone, since it's basically become the norm in Hollywood. 

"In photos taken in Selena's younger years, her nose was a bit wider throughout, and had a slight bump at the tip," says Dr. Jeffrey Rawnsley. "In more recent photos, [her] nose is noticeably thinner along the bridge and nostrils, and that noticeable bump has magically disappeared."

Plus, like dozens of young celebs of her generation, she's apparently been dabbling in lip fillers. 

"The most noticeable difference is the shape of the lips, specifically in the Cupid's bow," Dr. Adam Schaffner told Radar Online. "It appears to me that Selena had some fillers added to her lips," adds medical nurse practitioner Gaspar Rosario. "Her Vermillion border, or lip line, appears to be plumped and swollen. This is characteristic of a filler injection where the lip line is traced."

I'm with the experts—the pictures don't lie, and as we've seen with Kylie Jenner, makeup alone just can't work this kind of magic!

How do you feel about Selena's beauty evolution?
Which of these looks is your favourite?
What "beauty work" do you think she's had done?