Sir Rod Stewart has taken to Instagram to share a rare and rather exasperated clip explaining the torrid time he's experiencing thanks to his beloved Celtic FC.
The Scottish footballing giants have caused Sir Rod to experience sleepless nights and feelings of "humiliation" thanks to a series of underwhelming performances on the pitch.
And following Tuesday's 2-0 defeat at the hands of Motherwell, Sir Rod decided enough was enough as he took to Instagram to vent his frustrations.
"I didn't sleep last night, and I’ll tell you why," Sir Rod began in a rather sombre speech directly to the camera from his gym.
Sir Rod Stewart has shared a video expressing his dismay at Celtic
|Gesturing to the green and white memorabilia hoisted in his gym, Sir Rod went on: "We were beaten — Celtic, that is, and I love the Celtic, as you can see - by a very, very good Motherwell team who play, in my opinion, very modern, advanced football.
"They just kept attacking and attacking, and it was made easy by our backline that didn’t seem to exist.
"We were humiliated — really humiliated. Now, where is this all going to end?" he pondered, turning his attention to the team's manager, Wilfried Nancy.
The Frenchman has endured a chaotic start to life in Glasgow, and things aren't exactly going to get easier as Celtic's next match is the Old Firm Derby against Rangers on January 3.
Wilfried Nancy (centre) and his Celtic FC team suffered a 2-0 defeat to Motherwell yesterday
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Sir Rod asked: "Is Nancy going to go? Is he going to be sacked, like Russell Martin, maybe? Or is he going to continue, and we’re going to keep losing?
"He has now won two games out of seven, and apparently, the worst manager we’ve ever had was sacked after eight losses in 29 games.
"John Barnes. Over six months. Eight losses, 29 games in six months, and then he was fired."
The singer continued: "It looks like this guy’s going to continue, so it breaks my heart. Should we give him a chance in January? I don’t know, but it looks like he’s going to stay."
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Sir Rod Stewart (centre) regularly throws his support behind Celtic at home games
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Reflecting on why Celtic's on-field performances affect him so much, Sir Rod delved into his family's love for the sport.
"I come from a footballing family. We all love football," he said. "I remember my mum once said, 'Football has caused more distress and arguments in the Stewart family than Adolf Hitler.'
"So, with that thought in mind, I’ll be up there on Saturday to watch the Celtic, and good luck, Rangers," Sir Rod signed off with a laugh, suggesting a Rangers victory would result in Mr Nancy's sacking from the club.
While Sir Rod may not be convinced by Mr Nancy's appointment, the Celtic manager remained relatively optimistic following his side's 2-0 defeat at the hands of fellow title chasers Motherwell.
Wilfried Nancy is under pressure just weeks into his role at Celtic
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"We want to keep going, but this was a stop. This stop is going to allow us to be better collectively," Mr Nancy said after the match.
"The message is getting across, but we faced adversity today, and that is the reality, after that comes a bit of doubt.
"I believe I saw good stuff, to press in the good moment and defend in the good moment.
"We were not as connected as we have been tonight."
Sir Rod Stewart wants change for his beloved football club
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Celtic currently sit three points behind league leaders Hearts in the Scottish Premiership Table.
Rangers will be hoping to secure three points against their arch rivals on January 3, which would result in them and Celtic being level on points heading into the second half of the season.