English Idiom - Singing a Different Tune
The idiom for today is singing a different tune. To sing a different tune is to change your opinion or attitude about something. We often use this idiom when we are judging someone's first attitude and think the new attitude is more appropriate. Take a look at some examples to see what we mean.
Notice that the phrase is often used in the continuous verb form: singing a different tune.
You think you don't need to save for retirement, but you'll be singing a different tune when you're 70 and still working.
When I was younger, I used to judge parents that I saw, but I was singing a different tune after I had my own.
Charlie said he didn't care if Monique left him, but he sang a different tune when she actually broke up with him.