The tune is the same as in Marcos Valle's song 'Samba de Verão' (1964). Next to that it's just one of many covers of a song with different lyrics, focus and connotation from Norman Gimbel. Anyway I like Stacey Kent's interpretation of 'So Nice' best: here.
It would be so nice. You and me. Someone to understand each little dream in me. Someone to sing to me.
P.S. Original lyrics of 'Samba de Verão' and translation into English: here.