“Carpool Karaoke” made singing in cars a thing. For a few days in one city in Finland, you could sing in taxis instead of paying, says this short article from Japan Times Alpha (a good place to get some reading practice in English, this site has Japanese translations of the articles to help you understand and improve vocabulary). This article is labeled in the “easy” to read category. Read it to find out why the company did it.
The Japanese: 「フィンランドの音楽フェス、シャトル運賃の支払いは「歌」で」