Country crooner Faith Hill has been the subject of countless photo shoots, but until now, she's always worn clothes. However, for her 41st birthday, she stepped outside her comfort zone and posed in a little bitty bikini for the cover of Shape magazine.

She says that her Pilates workout gave her the confidence to take this giant step. Not only does she look great, but she also told Shape, "I could bend in ways I haven't been able to since I was a teenager," ookily adding that her perma-hatted husband, Tim McGraw, "loves it!"

Faith's definitely not the only hot mama who's celebrated more than 40 birthdays -- not by a long shot. Check out our gallery of hotties over 40 and let us know who else you think we should add.