Following our guides to current popular culture in the US and the UK , Jess in our Australian office, tells us what 'thongs' actually means in Australian summer, and the current political news which has made world headlines.   What’s popular in the music world at the moment? 'A mixture of pop, R&B and house music currently top the Aussie charts, with performers like Jason Derulo, Katy Perry & Avicii among the