Lady Gaga Filming New Video at California Castle: Report

Lady Gaga attends the 2014 MusiCares Person of the Year rehearsals, VIP gifting and auction signings at the Los Angeles Convention Center on January 24, 2014 in Los Angeles, California.

Araya Diaz/WireImage

Pop star filming unnamed music video at castle built by William Randolph Hearst

Tourists are giving way to dancers as a production crew takes over Hearst Castle on the California coast, where Lady Gaga is shooting a big-budget music video.

The San Luis Obispo Tribune says filming is taking place this week at the indoor blue-and-gold tiled Roman Pool and the outdoor Neptune Pool.

The pop diva had yet to be seen as crew members carried in bags full of fake flowers and a giant plaster seashell Tuesday.

Shoots at the state historical site are extremely rare. Gaga is donating $250,000 to the Hearst Castle foundation in addition to underwriting a $25,000 water supply study and paying special fees.

She will also make a water conservation public service announcement and a short feature on the castle built by newspaper publisher William Randolph Hearst.