Selena Gomez's workout classes reportedly cost $450 an hour.
The 26-year-old star works hard to keep herself in good shape and she's seemingly happy to spend a pretty penny on her keep-fit sessions, which include a Hot Pilates class.
A source told E! News: "She loves that the heat truly cleanses her body and she has been feeling much better since going frequently."
The classes reportedly take place in 95-degree heated studios and the participants are encouraged to use light weights and resistance bands to help sculpt their figure.
An insider explained that the overarching ambition behind the energy-sapping routine is to release stress and to increase flexibility.
Meanwhile, Selena recently reveled she is "excited for the new year" following her trip to rehab.