A schizophrenic man charged with attacking singer Leona Lewis during a London book signing last October has pleaded guilty to assaulting the star and been ordered to remain in hospital under Britain’s Mental Health Act.

Peter Kowalczyk, 29, appeared at London’s City of Westminster Magistrates Court to answer a charge of common assault. According to court documents, the pop star was left with redness and swelling to the face, and whiplash symptoms after being punched by Kowalczyk.

“I feel completely devastated by this attack. Now I am very frightened about going out in public and I don’t know where the next attack will come from and if this will be more serious than what has just happened,” the “Bleeding Love” hitmaker.

District Judge Howard Riddle has ordered Kowalczyk to remain in hospital for an indeterminate period.

“This is what happens when you don’t take your medication. A woman is now devastated,” the judge told Kowalczyk.