FLAMBOYANT KISHORE KUMAR
Incidentally Tum Bin Jaaon Kaha was also sung by Mohd Rafi.
Both were used in the film 'Pyar Ka Mousam'
And whenever Rafi vs Kishore discussions come up this song is always taken into considerations,
Some says Rafi version was better and then others say Kishore was better.
Personally I think both renditions were superb.