With the release of a new single, this well-known artist has officially become a country music artist instead of just a friend to the genre. You've seen her face on some of the most popular duets of the last five years, and recently she's become besties with one of the country's hottest couples.

Can you figure out whose yearbook photo this is? Here's another clue: America fell in love with this singer 10 years ago this month. She was an overnight pop superstar, but over the last half decade she's drifted more and more into country music circles. A recent duet earned her and a country hitmaker a Grammy nomination for the 2012 awards, but they ultimately lost to the Civil Wars. Click the big orange button below to find out if your guess is right and to see more country music yearbook photos.