The 'Happy' hitmaker, who has sold five million records this year, will pick up the Raymond Weil International Award, while 'Can't Rely On You' singer Paloma will be presented with the Royal Albert Hall Best British Act Award and Italian producer and dance music pioneer Giorgio, who has collaborated with Daft Punk, will receive the American Express Innovation Award at the ceremony.
Paloma said: ''I'm a great advocate of British music, so to be awarded the Royal Albert Hall Best British Act Award at the O2 Silver Clefs is amazing. Music has always been a form of therapy for me so I am glad to be supporting Nordoff Robbins and helping them to raise awareness of their work, helping people connect and communicate through music.''
Nordoff Robbins provides music therapy for thousands of people across the UK, helping sufferers of autism, stokes and dementia open up and connect to their surroundings, increase communication skills, self-esteem and confidence.
The event this year will take place at the London Hilton, Park Lane, on Friday, July 4.
Spencer Morrill believed he was in a relationship with the singer and that she was hiding messages for him in her songs.
Was the singer unknowingly taking counterfeit pain medication?
Roberts had left the band in 2012, due to problems with blood circulation and other health issues.
The popstar turned actress is back in the studio.