London, June 27 (IANS): Singer Jessie J, in an emotional update, has admitted that she is "in a lot of pain" following a mystery operation.

The singer felt that she should be honest with her fans after receiving numerous messages of support, but admitted that she was struggling to stay positive, reports mirror.co.uk.

"I have seen a lot of 'How are you today' comments... How am I.... *Looks up sighs and has to be honest*," Jessie J wrote on Instagram.

"I am not ok... I am in a lot of pain. But I'm working on it with the doctors. We all have our moments and one of mine is now..

"Being human s**ks when you are non stop and your body says NOPE not right now. Unexpected but I'm here trying my best to not let it win."

She thanked fans for their support, adding it is helping "so much" and hoping that by being honest she may help herself recover.

The update comes after the singer had to cancel concerts after taking longer than expected to recover.

She suffers from a heart condition, but insisted earlier this week that her latest trip to hospital was nothing to do with her voice or heart.