London, Sep 19 (Inditop.com) British singer Amy Winehouse is undergoing excruciating dental reconstruction after drug binges ruined her teeth.

A series of fillings and extractions over recent weeks has left the singer in constant pain, reported thesun.co.uk.

“Amy’s teeth were in a pretty gross state. They were brown and stained and needed major work and she was determined to get them back to their sparkling best,” said a source.

“It’s all major work and it’s left her in almost constant pain, but she thinks the sacrifice is worth it. She’s been given some very strong drugs to cope with the pain,” added the source.