The supermarket car

There was a car parked outside the supermarket, opposite the stage. Nobody knows what was inside, but the whole country ended up singing about it. Some clues in this case come as riddles. Four people and one microphone: one person per row, one per column. Whoever is left alone with it in the same room is the one you're looking for.

Suspects

• Albano, the shelf-stacker: He stacks shelves and knows what every customer has in their car. He says that one was mostly carrying hope.
• Bibiana, the car's owner: She only went out for bread. When she came back, her car was the chorus of the summer.
• Custódio, the parking attendant: He's been parking cars in the supermarket car park for twenty years. None of them had ever become famous.
• Dalila, the cashier: She scanned the microphone's barcode twice before realising it wasn't for sale.