Social media can be a messy business full of opinions and celebrity influence. But can celebs speak freely online, and what happens when they do?

In some parts of the world celebs and influencers are sometimes censored from sharing opinions altogether, unless they align with the state.

We look at three countries: Egypt, India and China. The BBC’s Jaidaa Taha in Egypt talks us through what footballer Mo Salah has said online. Rupsha Mukherjee, a BBC reporter based in India, explains why actor Chetan Kumar was arrested over a tweet. And Kerry Allen, the BBC’s Chinese Media Analyst, shares what’s allowed, and what’s not, in China.

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