Christina Aguilera is taking her hard-hitting message about domestic violence on the road with her - by beaming a new TV ad onto a huge screen before her shows. Aguilera joined Nicole Kidman in a new End Violence Against Women campaign ad and she's so proud of the public service announcement, she's urging fans at her Back to Basics shows to take a moment to watch and listen. The campaign is part of global effort to end gender violence, something Aguilera was close to throughout her childhood. The pop star has spoken out and penned songs about witnessing the abuse her mother suffered at the hands of her father.