Padge-Victoria Windslowe guilty of murder
Padge-Victoria Windslowe, who performed illegal plastic surgeries, has been jailed for at least 10 years after the death of London dancer Claudia Aderotimi,  Philadelphia Police Department

A former madam who called herself "the Michelangelo of buttocks injections" has been sentenced to at least 10 years in jail for the murder of a British dancer.

Padge-Victoria Windslowe, 43 - the "Black Madam" - used industrial-strength silicone to increase the size of women's buttocks that killed Claudia Aderotimi, 20, who travelled to Philadelphia in 2011 for the operation.

Windslowe ran "pumping parties" in residences, where women received the procedure to enhance their backsides.

Despite government warnings, the use of low-grade silicone for plastic surgery continues underground among women that cannot afford professional plastic surgery.

Windslowe once ran a transgender escort service and performed in "gothic hip-hop" music videos.

Speaking in court, Windslowe said: "I'm truly sorry for the people I harmed, but know from the bottom of my heart that it wasn't malice."

According to NBC Philadelphia, she told the judge that after her sex change, receiving silicone butt injections made her feel attractive, and that she liked making other women feel that way.

"I basically felt like an ugly duckling turned into a swan," she said.

"I never had [respect] when I was younger, because I was a boy with a girl inside of me," she said.

The jury found also Windslowe, who also goes by Page Gordon, guilty of another aggravated assault for injecting another woman's buttocks. The injection in that case - after Aderotimi's death - caused a pulmonary embolism, and prosecutors said she still suffers from breathing problems.

"She can't play with her son like other moms because she's short of breath," Assistant District Attorney Carlos Vega said in court. "She, being a single mother, doesn't have the luxury of dying."