The Maggie May singer had indulged in 'a couple' of drinks ahead of Celtic's Champions League match against Bayern Munich ...

and the list goes on. He also took the stage during the 50th anniversary season of Saturday Night Live earlier this month, performing “A Bar Song (Tipsy)” on the Dec. 7 show, hosted by Paul ...

"A Bar Song (Tipsy)" is also up for best remixed recording ... The two performed ""Sweet Honey Buckin'" for the first time together live. "It's amazing in so many different ways.