sing
sing a different tune (or song) change your opinion about or attitude towards someone or something.
sing for your supper: seesupper.
sing from the same hymn (or song) sheet present a united front in public by not disagreeing with one another. British informal
2000South China Morning Post We're all singing from the same hymn sheet and there is a real will to clean up the game, though it may take a life ban to restore cricket's credibility.
sing the praises of express enthusiastic approval or admiration of.