Ariana Grande has announced that she's planning to take a break from the public eye after her Eternal Sunshine tour ends in September. She started her performing career when she was a kid and has since become one of the biggest pop stars in the world, winning three Grammys and most recently portraying Glinda in the hit film Wicked.

But over the past couple of years, a lot of the conversation online about Ariana hasn't been about her music or acting: it's been about her appearance. That's despite her asking people repeatedly not to comment on her body over the years. Her most recent music video, Petal, went viral after some fans said they were concerned about how thin she was.

So, is it ever ok to talk about a celebrity's health or appearance? And where's the line between concern and scrutiny?

Chelsea Coates from the What in the World team joins us to discuss it all - and we hear how Ariana’s fans are reacting to her decision to take a break.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producer: Emily Horler and Chelsea Coates Editor: Verity Wilde

If you are concerned about your health, you could speak to a health professional. If you are suffering distress or despair and need support, you could speak to a health professional or an organisation that offers support. Details of help available in many countries can be found at Befrienders Worldwide. www.befrienders.org