This one has two women extolling the virtues of their respective beloveds little knowing they're the same person (Rajendra Kumar! 
)
Woh toh lakhon mein hai ek haseen
Bholi soorat ada naaznein
Mere Mehboob mein kya nahi
Film: Mere Mehboob (1963)
Music: Naushad
Lyrics: Shakeel Badayuni
Singers: Lata Mangeshkar & Asha Bhosle
Like I said, nothing woos like Rafi's voice (with a little help from the heroes on screen, ofc! 