change (one's) tune(redirected from changed her tune)
change (one's) tune
To change one's attitude, opinion, manner, or stance on something, typically in a way that is more positive or agreeable. The mention of a hefty tip really changed the host's tune, so I think he'll be able to find us a table after all. After I threatened him with no allowance, my son changed his tune and started doing his chores.