Carrie Underwood is grateful eyebrow pencils exist so she can ''fix'' her arched brows.

The 33-year-old singer has claimed she damaged her facial features when she was younger, and is ''very happy'' there is a variety of products in a range of colours she can use to cover up the irreversible beauty blunders she made by over-plucking.

The 'All-American Girl' hitmaker told PEOPLE: ''Growing up in the '90s I feel like the thin eyebrow was definitely a thing and I, like so many others, overdid it.

''They never really grew back the way they were supposed to so now I am very happy that they do have eyebrow pencils, so I can fix what I did to myself when I was young.''

But the songwriter's facial hair was not the only issue she had as a youngster, as she also opted for a perm, which she strongly regrets.

She explained: ''[My] worst hair moment ever would probably be me in the sixth grade when I decided that my bangs should have crazy amounts of gel ... [and] I had a perm at some point, when I was like 14. That was a bad idea.''

The 'American Idol' champion - who was crowned the winner on the fourth season of the talent show in 2005 - was never happy with her freckles, or her teeth, and went to extreme lengths to change her appearance.

She said: ''I had freckles on my face and they were in the exact same spot on both of my cheeks, so I felt like I got teased at school. I remember asking my mom if we could get rid of them. Well, I did get rid of them.

''I had bad teeth, too.''

Carrie has revealed she had to wear dental braces for a number of times to align her pearly whites.

She explained: ''I had to get braces [more than once]. I actually had them on the bottom for like three months while I was doing red carpets, but no one knew - so I felt like I had a secret.''