Chiara Danese, a former teen beauty contestant, had been taken to a party at Berlusconi's villa at Arcore after she appeared in a screen test for the TV news show of Berlusconi's friend Emilio Fede, the Italian news agency ANSA reported.
Danese, a teen beauty contestant who was 18 when the party allegedly happened in August 2010, said women at the party kissed the statue before stripping and engaging in mutual fondling with Berlusconi.
Danese said she and another aspiring weather presenter, Ambra Battilana, asked to leave.
"We were embarrassed and wanted to leave," Danese said in court Monday.
But when they asked to go, she said, Fede told them, "You can forget about being weather girls or Miss Italy."
Berlusconi is on trial in Milan on charges of having sex with an underage prostitute and abusing his power by having police free her after she had been charged with theft.