Singer is being treated at a Harley Street clinic
Sonique is undergoing surgery after being diagnosed with breast cancer.
The singer, real name Sonia Clarke, was told she had the life-threatening disease last Tuesday.
She is being treated at a clinic in Harley Street, central London.
Her spokesman Stuart Watts says she is having the op as a matter of urgency.
She was admitted to hospital at 7am today and is due to remain there until at least Saturday.
Sonique, 40, has enjoyed chart success with hits I Put A Spell On You and It Feels So Good.