Carrie Underwood likes to keep her beauty regime ''simple''.

The 31-year-old star is the face Almay cosmetics' new Simply American campaign - which is set to launch next week - and believes the make-up range is perfect for those who like a more ''natural'' look.

She told PEOPLE magazine: ''Simply American beauty, for me, is about keeping things simple and feeling good about yourself. It doesn't have to be complicated, it's that natural beauty that we all possess.''

The 'Something in the Water' singer - who is expecting her first child, a baby boy, with husband Mike Fisher - embodies the ''All-American Girl'' theme in the campaign images by donning a stars-and-stripes printed vest while relaxing on a gingham blanket and swing-chair with her adorable puppy Ace.

The blonde beauty - who is a spokesperson for Almay - recently confessed that she prefers to do her own make-up rather than be fussed over by a professional.

She explained previously: ''When I am on tour I enjoy doing my own hair and make-up. There are just so many people on the road, and it's kind of therapeutic for me to be able to sit on my butt, and have all my things, and it's quiet. It's my time to play.''

Carrie also revealed that while she likes to appear natural, she rarely goes out without any cosmetics on at all.

She added: ''I don't think I ever have make-up free days, to be honest. I wear make-up for me. I don't want to walk by a mirror and feel like I haven't given some sort of effort. I just feel better when I have a little on.''