Cee Lo 'fills in for Rihanna at benefit'

Cee Lo Green replaced Rihanna as the headlining performer at a benefit for the Women's Cancer Research Fund last night.

The 'F**k You!' singer filled in for Rihanna after she cancelled her appearance at the 'Unforgettable Evening' event in Beverly Hills due to a serious bout of flu, reports The AP.

Green is said to have performed four songs with his four-piece band.

Conan O'Brien acted as host for the evening, which also honoured Annette Bening and Martin Short for their fundraising efforts in the organisation's name.