GLASGOW, SCOTLAND - MARCH 01: Celtic fans do the 'Poznan' during the Scottish Premiership match between Celtic and Aberdeen at Celtic Park Stadium on March 1, 2015 in Glasgow, Scotland. (Photo by Stu Forster/Getty Images)
GLASGOW, SCOTLAND - MARCH 01: Celtic fans do the 'Poznan' during the Scottish Premiership match between Celtic and Aberdeen at Celtic Park Stadium on March 1, 2015 in Glasgow, Scotland. (Photo by Stu Forster/Getty Images)