With protesters at a summit meeting threatening violence it was time for the riot police to bring out their secret weapon - pop star Katy Perry.
The singer's hit Roar was played at a deafening volume as officers in the Philippines sought to distract the protesters and drown out their chants.
Hundreds of Left-wingers had gathered outside a venue in Manila where Barack Obama and other leaders of the 21-member Asia-Pacific Economic Co-operation group were meeting.
Some protesters tried to break through lines of police, who were carrying riot shields and wooden batons. Officers responded with water cannons and scuffles broke out before the loudspeakers were wheeled out to play a demonstration disco playlist.
Dolly Parton's Islands in the Stream, David Guetta's Sexy B***h and the Bee Gees' How Deep is Your Love were among the other songs deployed. To add a level of menace, some of the police tapped their batons against their shields in time with the music.
