A trillion to the tenth power? Trends of the week
Musical duets with Iphone's Siri, the mystery Lionel Messi fan found and American Rapper Macklemore's new song becomes a heated discussion topic on Twitter.
All that and more in BBC Trending's Trends Of The Week. You can also listen to our radio programme here.
Produced by Nooshin Soluch
Picture credits: Getty Images, Facebook/Marcus Perez , Arif Ahmadi, Twitter/Sayed_Anvar, Twitter/@tyrellephillips, Twitter/@Karnythia, Twitter/jcobayan,
31 Jan 2016