Carly Rae Jepsen is cancelling her performance at the Boy Scouts of America Jamboree because of the organisation's exclusion of gays.
Jepsen, the Canadian pop singer best known for the hit Call Me Maybe, made the announcement on Twitter today.
"I always have and will continue to support the LGBT community on a global level," she wrote, "... and stay informed on the ever changing landscape in the ongoing battle for gay rights in this country and across the globe."
Pop rock band Train also has also taken a stand, but pursued a different tack in a post on its website on Friday.
The group asked the BSA to reconsider its policy rather than immediately pull out of the July gathering in West Virginia. The event, held once every four years, is expected to draw more than 45,000 scouts and adults.