Ariana did look a bit different before her surgeries (brow lift, nose, lips):
View attachment 4111592
https://www.betrendsetter.com/ariana-grande-plastic-surgery/
You realize this pic was when she was 14, right? People's facial structure change during puberty and their teen years. She's looked pretty much the same since she was 16. I guess it's possible to get plastic surgery when you're 15, but I doubt it.