Five bizarre celebrity health trends we dare you to try

In 2004, Paltrow was first snapped with strange marks on her back from cupping. Dating back to ancient Egyptian, Middle Eastern and Chinese cultures, cupping is believed to improve circulation and reduce stress.

How's it done? Practitioners heat cups (usually made of glass or bamboo), and place them lip-down on the client’s skin. As the cups cool, it creates a suction making the skin rise and fill with blood (as the blood vessels expand).

It's known to be more uncomfortable than painful and stars like Lady Gaga, Lena Dunham and Victoria Beckham have been seen wearing their cupping marks with pride.