Carrie Underwood + Billy Currington

“If it wasn’t for guys like you, there wouldn’t be songs like this,” sings Carrie Underwood in a tune from last year’s Play On. What she doesn’t add is that if it weren’t for songs like “Songs Like This,” Underwood probably wouldn’t be the star she is. Since winning the fourth season of American Idol in 2005, this 27-year-old Oklahoma native has become one of the biggest names in country music, thanks largely to rowdy tough-chick anthems such as “Before He Cheats” (in which she digs her keys into the side of his pretty little souped-up four-wheel drive) and “Last Name.”