Examples:

• She didn’t like the new policy at first, but after getting a promotion, she started singing a different tune.
• He criticized online learning, but when he tried it himself, he sang a different tune.
• Once the team started winning, the critics began singing a different tune.
• They refused to invest earlier, but after seeing the profit, they sang a different tune.
• He mocked the gym routine, but after losing weight, he was singing a different tune.
• When the rain ruined their picnic, the kids sang a different tune about going outside.
• She was against the idea, but after understanding the benefits, she sang a different tune.
• My boss didn’t support the plan, but after the client approved it, he sang a different tune.
• He didn’t care about savings, but after facing a financial crisis, he started singing a different tune.
• They rejected the proposal earlier, but after seeing the data, they sang a different tune.