GLASGOW, SCOTLAND - MARCH 12: Rod Stewart kisses his son Aiden in the stands prior to the Ladbrokes Scottish Premiership match between Celtic and Rangers at Celtic Park on March 12, 2017 in Glasgow, Scotland. (Photo by Ian MacNicol/Getty Images)
GLASGOW, SCOTLAND - MARCH 12: Rod Stewart kisses his son Aiden in the stands prior to the Ladbrokes Scottish Premiership match between Celtic and Rangers at Celtic Park on March 12, 2017 in Glasgow, Scotland. (Photo by Ian MacNicol/Getty Images)