sing a different tune

US /sɪŋ ə ˈdɪf.rənt tuːn/
UK /sɪŋ ə ˈdɪf.rənt tuːn/
"sing a different tune" picture
1.

cantar uma melodia diferente, mudar de opinião

to change one's opinion or attitude, especially to one that is more agreeable or favorable, often due to a change in circumstances

:
After he lost his job, he started to sing a different tune about the importance of saving money.
Depois de perder o emprego, ele começou a cantar uma melodia diferente sobre a importância de economizar dinheiro.
The company was arrogant, but after losing a major client, they quickly started to sing a different tune.
A empresa era arrogante, mas depois de perder um cliente importante, eles rapidamente começaram a cantar uma melodia diferente.