Ariana Grande has had a whirlwind year.

The 21-year-old pop star scored one of the biggest years of her career in 2014, with hits including "Problem," "Break Free" and "Bang Bang," which featured Jessie J and Nicki Minaj.

In a recent interview with Very magazine, the former Nickelodeon star talked about her evolving style. Grande admitted she finds it weird when people are surprised that she doesn't wear girly, frilly clothes anymore, according to Yahoo! News. 

"Especially when they told me for so long that I looked like a kid and I should stop looking like a kid," she acknowledged. "I was like 'Well I dress how I want to dress'. So now I'm ready to look like a woman, it's all of a sudden not OK. So, you know, it's all a matter of doing what you want without worrying what other people have to say about it. What other people think of you isn't really your business anyway."

She also noted that as her music progresses as she grows up, so does her wardrobe. The star pointed out she's changed style with every music video she's made.

"It's evolved a little. I don't wear frilly tutu dresses. I can't really stand that stuff anymore," she explained. "But I liked the short go-go dresses and the sweater and boots combo for when I was doing the 'Problem' single. Then I shifted towards cute little underwear space-type vibes for 'Break Free' and now I'm into this knee-length pencil skirt and crop top bralet thing for 'Love Me Harder.'"

When she isn't in her stage costumes, Grande says her day-to-day casual outfit consists of high-waisted jeans, a crop top and heels. As for her hair, she likes to rock her trademark ponytail, but she says she does find it weird how obsessed people are with it.

"'Funny' is the word," she laughed. "I never thought that switching up my hair would be such a big deal. But whatever fascinates people."