The Saturday's singer Frankie Sanford says it was a relief to tell her bandmates about her depression.
The 24-year-old says she has suffered from the condition for years and knows how hard it is to talk about it in public.
She has joined mental health charities Rethink and Mind for their It's Time To Talk campaign, which is trying to encourage people to discuss mental health whether they are a sufferer or not.
She was talking to Newsbeat's entertainment reporter Chi Chi Izundu.
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