In most of CR's songs, there is always some little charming nuance that catches the ear strikingly. In this one, it would have to be the humming in the antaraas. After the first line of each antaraa, she persists on
the last syllable in a sort of wavy motion, then softens her voice ("modulates" is the word I'm looking for, I believe) and dissolves the word into humming, all along the same musical trajectory. Amazing effect.

That does it with the solos in Khazana, I believe... there are a couple of choral numbers and a duet with Rafi, which I'll get to.

 % ITRANS Song # 
 % 
 \startsong 
 \stitle{soyii soyii chaa.Ndanii hai}% 
 \film{khazana}% 
 \starring{madhubala}% 
 \singer{lata mangeshkar}% 
 \music{chitalkar ramchandra}% 
 \lyrics{rajinder krishan}% 
 % 
 % Contributor: Hrishi Dixit
 % Transliterator:  Hrishi Dixit
 % Date: January 13, 2000
 % Credits: 
 % Editor: 
 % Comments: LATAnjali series 
 % 
 \printtitle 
 #indian 
 % 

 soyii soyii chaa.Ndanii hai

 soyii soyii chaa.Ndanii hai khoyii khoyii raat hai
 nayaa nayaa pyaar hai ye nayii nayii baat hai
 soyii soyii chaa.Ndanii hai

 soyii soyii chaa.Ndanii hai khoyii khoyii raat hai
 nayaa nayaa pyaar hai ye nayii nayii baat hai
 soyii soyii chaa.Ndanii hai

 gorii gorii chaa.Ndanii me.n jiyaa madahosh hai
 (beautiful humming)
 gorii gorii chaa.Ndanii me.n jiyaa madahosh hai
 tum mere paas ho
 tum mere paas ho bas itanaa hii hosh hai 
 itanaa hii hosh hai
 dil me.n khushii kii dhiimii dhiimii barasaat hai
 nayii nayii baat hai
 soyii soyii chaa.Ndanii hai

 soyii soyii chaa.Ndanii hai khoyii khoyii raat hai
 nayaa nayaa pyaar hai ye nayii nayii baat hai
 soyii soyii chaa.Ndanii hai

 jhukii jhukii a.Nkhiyan me.n man kii tara.ng hai
 (b. h. again)
 jhukii jhukii a.Nkhiyan me.n man kii tara.ng hai
 mastii me.n jhuum rahaa 
 mastii me.n jhuum rahaa meraa a.ng a.ng hai
 meraa a.ng a.ng hai
 duniyaa na jaane saiyaa.N terii merii baat hai
 nayii nayii baat hai
 soyii soyii chaa.Ndanii hai

 soyii soyii chaa.Ndanii hai khoyii khoyii raat hai
 nayaa nayaa pyaar hai ye nayii nayii baat hai
 soyii soyii chaa.Ndanii hai

 % 
 #endindian 
 \endsong