sing off the same songbook
To have the same understanding of something as someone else; to say the same things about something as other people, especially in public. Primarily heard in UK. I think we should have a meeting with everyone who's involved in the project. That way, we'll all be singing off the same songbook before we begin. Make sure everyone on the campaign is singing off the same songbook before we release any kind of statement to the press.
sing from the same songbook
To have the same understanding of something as someone else; to say the same things about something as other people, especially in public. Primarily heard in UK. I think we should have a meeting with everyone who's involved in the project. That way, we'll all be singing from the same songbook before we begin. Make sure everyone from the campaign is singing from the same songbook before we release any kind of statement to the press.