another favourites of mine in 1971 were Portugal: Tonicha - Menina (Do Alto Da Serra), a catchy song https://y.com.sb/watch?v=YMPF88rtrbk&list=PL6A56E518F8401C58&index=14
and Yugoslavia's Yugoslavia - Krunoslav Slabinac - Tvoj Dječak Je Tužan with funky balkan sounds that really trended only in the 2000s https://y.com.sb/watch?v=iX-LJdpxxbM&list=PL6A56E518F8401C58&index=15
generally i feel like there was a steady uptick of duos and groups, often accompanied by guitars or other stage instruments. so a step towards good show and not just singing.