Party Of The Week: Stars lend an ear to Bryan Adams' Hear the World appeal

The rock star and photographer Bryan Adams was in high spirits at a cocktail party on Tuesday night at London's Saatchi Gallery in Chelsea.

His exhibition of large-scale portraits of celebrity friends, including Lindsay Lohan and Diane Kruger, were snapped for the Hear the World charity, which promotes the importance of hearing and the problems caused by hearing loss.

Black-and-white portraits of Amy Winehouse and Mick Jagger were selling for £6,000 each, with all proceeds going to the charity.

Guests including the photographer Pattie Boyd, the actress Celia Imrie, the R&B singer Beverley Knight, the Harry Potter actress Evanna Lynch, Newsnight's Gavin Esler as well as the fashion designer Roland Mouret and the model and heiress to the Guinness brewing fortune, Jasmine Guinness, sipped cocktails and were invited to have hearing tests on computers. Trevor Baylis, meanwhile, the inventor of the wind-up radio, spent the evening promoting his latest invention – a wind-up walking stick. He demonstrated its many talents to the paparazzi, including a magnetic handle which could be useful, so he said, if you dropped your keys.

Apparently Adams, who is famous for songs such as "Run to You" and "Summer of '69", took the portraits for the charity because he has a special interest in hearing problems; years of performing live on stage have exposed him to the damaging effects of constant, blaring rock music.