British singer Lily Allen has grown so sick of her number one debut single SMILE, she insists the song "does my head in". The outspoken star amazed fans watching her performance at this weekend's (09/10SEP06) Bestival festival on England's Isle Of Wight with her frank admission, because many saw the track as a highlight of her set. Despite her obvious distaste for the song which saturated British radio stations this summer (06), Allen still performed it much to the delight of the crowd.