Carrie Underwood: Skull & Bones Babe

Carrie Underwood wears a skull and bones tee as she leaves the gym with a bodyguard in tow on Tuesday (October 6) in Los Angeles.

On Friday, the 26-year-old American Idol champ visited the Grand Ole Opry House to flip a switch to turn the backdrop pink to symbolize the fight against breast cancer in Nashville, Tenn.

Carrie told CMT, “There are a lot of people out there who have been fighters and who have made it through cancer, but there are a lot of us who don’t want to have to go through that fight. Of course, nobody wants to, but we want to make sure that doesn’t happen, so we’re honoring the people who have been through it and who have made it through it. We’re supporting them, we’re raising awareness and we’re hoping to stop it in its tracks.”