@vinsan,
There is a cute story behind the "Sayonara" song... It was cherry blossom when the song was to be picturised and inital outfit (kimono) that asha parekh wore was blue.
One of the passer-by on the location of the shooting, was a Japanese lady who saw asha parekh in the blue kimono and nearly lashed out on the director for having a wrong dress color code for the season. According to her it should have been red, purple, pink or white.
So the director hurriedly changed the kimono for a white pink one. I think we owe to that unknown passer by for all the sweetness harnessed by Asha in the song in that utterly cute white pink kimono.