Faced with rumors of a "sex tape" featuring Christina Aguilera circulating the Internet in recent weeks, the pop starlet's management has posted a message denying the validity of such claims on her of

Faced with rumors of a "sex tape" featuring Christina Aguilera circulating the Internet in recent weeks, the pop starlet's management has posted a message denying the validity of such claims on her official Web site.

"It has recently come to our attention that certain pornographic Web sites are posting sexually explicit photographs and video footage on the Internet fraudulently representing that it is Christina," the statement reads. "The video clips advertised on the Web sites are of a woman with blonde hair shown only from the back -- the person in the video is not Christina."

The unidentified adult content sites reportedly feature video clips along with boasts by a man who claims to have made the videotape of a woman named Christina who did not know she was being taped.

"In addition," the statement continues, "the person who claims to have taken the video is not, and has never been, associated with Christina or her management. Christina's legal representatives have contacted the Web site hosts, and Christina plans to vigorously pursue all necessary action against the individuals responsible, including, if necessary, initiating criminal proceedings. We regret that there are individuals who engage in such fraud with no regard for the injury to Christina's feelings or reputation."

Adult sites claiming to have nude pictures of Aguilera and her fellow female pop stars Britney Spears and Jennifer Lopez are common on the Internet, yet only a few bother to note up front that such shots are fabrications. Entering the name of any of the stars and "nude" into any search engine will turn up links to dozens of sites purporting to possess such racy photos.

In less salacious news, earlier this week, Aguilera received two nods in the best pop collaboration with vocals category to extend her Grammy nomination streak to three consecutive years. For the upcoming 44th annual awards, she was recognized for "Lady Marmalade" -- her collaboration with Lil' Kim, Mya, and Pink for the Interscope soundtrack to "Moulin Rouge" -- as well as her duet with Ricky Martin on "Nobody Wants To Be Lonely," from his Columbia album "Sound Loaded."

At the 42nd annual Grammy ceremonies, Aguilera walked away with the best new artist trophy; last year, she was nominated for best pop female vocal performance ("What a Girl Wants") and best Latin pop album ("Mi Reflejo," RCA). This year's Grammys will be handed out Feb. 27 in Los Angeles, and will be televised on CBS.

As previously reported, Aguilera will be among the performers participating in the Feb. 24 closing ceremonies of the 2002 Winter Olympic Games in Salt Lake City.