change your 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.
See also: change, tune
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

change your tune

COMMON If someone changes their tune, they express a different opinion about something from the one they had expressed before. Wait till they see you in action. They'll change their tune then. You've changed your tune. You were the one who wanted us to be a family act. Note: You can also talk about someone's change of tune. These comments mark a change of tune from the president.
See also: change, tune
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

change your tune

express a very different opinion or behave in a very different way, usually in response to a change in circumstances.
See also: change, tune
Farlex Partner Idioms Dictionary © Farlex 2017

change your ˈtune

(informal) change your opinion about or your attitude to somebody/something: Tom used to say that parents worry too much about their children, but he soon changed his tune when he became a parent himself!
See also: change, tune
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
Now, thanks to a new ITV show called Change Your Tune, Jude will have her 15 minutes of fame as she bravely prepares to sing to the nation tomorrow.
Jude Ward, of Sutton Coldfield's Tuneless Choir, on ITV's singing show Change Your Tune. Below, with dog Dibble