16. Britney Spears – psoriasis
She was the 90s and 00s queen of squeaky-clean pop, but Britney Spears has never been entirely blemish-free. I mean, look at her meltdown phase.
Hit me baby one more time
Spears, like 125 million people worldwide (or 2-3% of the global population), is said to suffer from psoriasis.
Psoriasis is a skin condition characterised by scaly red patches that can flare up when the sufferer is under pressure.