The woman at the center of what's become known as the "Bunga Bunga" sex parties scandal, Karima el-Mahroug, testified in court for the first time on Friday. The belly-dancer nicknamed Ruby the Heart Stealer told a court in sworn testimony of occasions in which she danced for money at parties for former Italian Premier Silvio Berlusconi.

On trial are three individuals who worked for Berlusconi accused of recruiting young women, some minors, for prostitution. El-Mahroug said she sometimes dressed up as a nun, others even attending in costume as President Obama. Eventually, all of them stripped down to their underwear. El-Mahroug demonstrated some of her moves in the courtroom, as well, pulling up her hemline to show just what she was asked to do.

She was just 16 years old at her first party appearance.

Stay tuned to Fox News Channel for more developments in the trial.