'Yashomati maiya se bole nandalala' is a famous Lord Krishna song where Lord Krishna asks his mom why he has a [bad word] and Radha , his lady love is fair.
I still remember my childhood days where this song was played in Krishna temple nearby every morning.
This song was in the movie 'Satyam Shivam Sundaram' released in 1978 and the music director was by the famous legend, LaxmiKanth Pyare Lal.

Lyrics of 'Yashomati maiya se bole Nandalala'

Yashomati maiya se bole Nandalala
Radha kyu gori? Mai kyu kala?

Boli musakati maiya, lalana ko bataya:
kali adhiyari adhi-rata me tu aya.

Yashomati maiya se bole Nandalala:
Radha kyu gori? Mai kyu kala?

Boli musakati maiya: suna, mere pyare, (2X)
gori-gori Radhika ke naina kajara re.
kale nainovali ne aisa jadu dala,
isi lie kala. Yashomati... .

Yashomati maiya se bole Nandalala:
Radha kyu gori? Mai kyu kala?

Meaning of this song :

Little Krishna asks mother Yashoda, "Why is Radha fair while I am dark?"
Mother Yashoda smiled n told little Krishna, "You were born on a dark, stormy midnight. My beloved little Krishna has a black flute. Hence he is dark"
Little Krishna asks his mother Yashoda, "Why is Radha fair while I am dark?"
Mother Yashoda smiled n said, "listen my dear, the fair Radhika (Radha) has dark eyes. The eyed one has bewitched u hence u r dark"

Maa Yashoda tells little Lord Krishna he's dark because of the jadu of the Kali Nainowali (the dark-eyed Radhika). Krishna, being Consciousness personified, is ever enchanted with Radha (who is material existence and shakti personified). Our existence is filled with color, but all know that all [bad word] create black. In the same way, the shining Radha is the light that reveals Consciousness to be one, solid, unchanging, beautiful color.