ओ मेरे मन के राजा

'O Mere Mann Ke Raja' is the male-female romantic duet of Pattharon Ka Saudagar (1944), pairing Rajkumari with the singer Gopal under Mir Saheb's direction and Gafil Harnalvi's lyric. Within a soundtrack dominated by Sheela-and-Rajkumari female duets, it stands out as the score's principal heterosexual love song.

Mir Saheb gives the duet a flowing mid-tempo melody carried on harmonium and strings, the two voices answering each other in the call-and-response pattern that the period's romantic duets favoured. The arrangement is intimate and uncluttered, keeping Rajkumari's clear upper register and Gopal's voice in conversational balance.