The Spanish manager was seen having a cigar and singing Oasis classic Don’t look Back In Anger with colleagues celebrating the team’s title win.
The next Premier League match for City is on Tuesday night against Brighton, where they will lift the trophy in front of 10,000 fans after beating Everton on Sunday.
During his song, he repeatedly mentioned Noel Gallagher, appearing to dedicate his performance to the famous City fan.
Manchester has won three Premier League titles, four League Cups and the FA Cup under Pep Guardiola.
‘Don’t Look Back with Anger’ sounded like it was a familiar song for Guardiola – showcasing the fact that he’s become a true Mancunian since joining the club five years ago.