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 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.

Christina Aguilera has infuriated fans by reportedly lip-syncing at a New York concert on Friday (23.03.07). Audiences at the Madison Square Garden show were alerted to the possibility that the ‘Dirrty’ singer might have been miming through the entire set when she encountered undisclosed technical problems.

The blonde star’s manager Irving Azoff admitted there were some sound-related problems during the show, but did not comment on the allegations that Christina was lip-syncing.

He said: “Miss Aguilera is one of the most talented vocalists to ever grace the stage. However, we did have a technical problem with the sound equipment at the Garden.” The 26-year-old singer - who is married to music marketing executive Jordan Bratman - had so far received rave reviews for her ‘Back to Basics’ North American tour.