Although Paris Hilton has stayed looking smooth and porcelain through the ages, the 40-year-old star recently told Stella that she’s never gotten Botox Cosmetic or fillers. Instead, Hilton says she’s a fan of a face and body microcurrent treatment known as Neurotris.

Microcurrent is beloved by skin-care novices and professionals alike for its ability to “workout” the skin and deliver a more contoured appearance. By stimulating skin all the way down to the muscle, microcurrent treatments deliver an immediate improvement in facial toning and tightening, along with a major boost in the radiance department.

“I’ve never done an injection—no Botox, no fillers,” said Hilston. “Most of my friends have been doing that for years, since they were in their twenties, but I’m so happy that I’ve not done anything.”