They won the league at Tynecastle - and one pundit reckons that the Celtic party afterwards must have been bouncing if recent results are to go by.
Since winning the Premiership trophy in their first post-split game against Hearts, Ange Postecoglou's champions have lost to Rangers and Hibs, and drew with Mirren at home ahead of Saturday's trophy day game against Aberdeen.
The Hoops' boss has taken the flack and put recent performances down largely to rotation, the likes of third-choice goalkeeper Scott Bain played in the 4-2 loss at Easter Road, and making errors that resulted in goals.
Former Celtic defender Mark Wilson wonders if the party started in Edinburgh has had a lingering hangover effect, as a date with Treble destiny looms in the Scottish Cup final against Inverness Caley Thistle.