US singer-songwriter Patti Smith (L) and US singer Joan Baez poses for photographers at a press conference in Berlin on May 21, 2015. US singer-songwriter Patti Smith and director of the Tate Modern Chris Dercon will present Amnesty International's Ambassador of Conscience Awards 2015 to US singer Joan Baez and Chinese artist Ai Wei-Wei during a ceremony on May 21, 2015 AFP PHOTO / JOHN MACDOUGALL (Photo credit should read JOHN MACDOUGALL/AFP/Getty Images)
