Cristiano Ronaldo and his 'Siu' celebration has become something of an international phenomenon in recent years, with people adopting the shout at various points in random settings on a near-daily basis.
The Portuguese forward first screamed 'Siu' at the 2014 Ballon d'Or awards ceremony, and since then it has taken on a life of its own. Simply meaning 'yes' in Portuguese, Ronaldo previously explained it originated in a pre-season friendly against Chelsea in 2013.
