They probably had some technical problems. Roberta is a young singer with a strong voice, while here she seems a shy vocalist with a soft little voice...And her first name is Roberta, Gea is her second name...She is known as Roberta Gentile.
I don't know whether the volume wasn't very high on the girl's mike or whether she just doesn't have a powerful voice, but I could hardly hear her. Eros sounds so cute when he sings in English ❤️
I think the volume was very low on Roberta's michrophone. What a pity!! She actually has a powerful and a very charming voice, but here she seems a vocalist rather than a real lead singer as Roberta Gentile should be!!!