Katy Perry has confessed to doing just that while in India - "I got a vitamin B and antibiotic and a steroid," she admitted in May.
But while that sounds like a general health boost to us, the Daily Mail are saying the injection was to give her actual butt a lift.
"It has been used for many years in the Third World, where patients cannot afford more advanced procedures," they report.
"The injections contain steroids, antibiotics and vitamin B, which cause inflammation and, in turn, lift the buttocks."
Their experts said the treatment can "trigger an inflammatory abscess", "cause thinning of the skin" and cause antibiotic resistance.
Guess we won't be lining up for this one...