It is an artificially high voice; especially : an artificially produced singing voice that overlaps and extends above the range of the full voice especially of a tenor; a singer who uses falsetto.
The trick is in the pitch and tone of the voice. Most sites cite that the female voice is just one third of an octave higher than that of a male. There are several training vocal exercises that can help but for the most part it is a thing that has to do with "speaking like a female" by means of using the same choice of wordings as a female would do. If the boy has not hit yet puberty, proper hormonal treatment will suffice to keep his voice from changing, which will mean that over time the pitch will stay put. If voice changes have already happened, then vocal training can still achieve the results needed. Vocal chords surgery is not something to be taken lightly as it could potentially risk the boy with loosing his ability to speak altogether. There are girls who have a deep voice, but their tone and their "way of speaking" (choose of words, tonal variations, etc) is what makes their voice female.
Voice is determined through your voice box, or larynx. Males usually have a thicker larynx, which means they usually have lower voices (just adding!).
Location of the Adam's Apple is key to sounding like a girl. Girls have a much higher Adam's Apple, giving them their tone. To get the sound, you must raise your Adam's Apple while keeping pitch about the same. A good way to learn this is to make your voice go high; your Adam's Apple will move up. Now try to lower your voice while keep the Adam's Apple in place. After some practice, you should be able to get a feminine voice.
By singin low.
Being a contralto with low notes like F2
Singing in fry
Or trying out songs of tenor like
cinema bizarre
If they really want to or there just gay
Poison by Bell Biv DeVoe
I think she was born a proper girl but i think lady gaga used to be both and her parents chose her to be a girl witch is why she can sing like a boy!!!!
he does sing about persanale relationships and his life but he doesn't make it about a specific girl like he wont sing oh becky you broke my heart he may sing about like um oh girl you had me dieing you know like other relationships
if you really like this girl you should sing heaven by warrant. if you kinda like her i would sing you belong with me by Taylor swift
Justin Bieber the cute Canadian boy does hee is 15 and he is amazing. love u Justin !!
Boy who sing songs, live life like a girl
if you seek Amy i kissed a girl and NOT i like pussy that's just gross!
hi my name is dilbagh sing I wondered how you can tell boy ladybird from a girl ladybird?
Girl finches dont sing. But males do.
No cody does not sing like a girl! He sings awesomley and amazingly! He is AWESOME! 
Alto is generally for a girl, but boys who can sing high can also be altos.
if you ask any girl "dose Justin bieber sing like a girl"most of them will say no but alot will say yes yes he dose sing like a girl
For a boy i will like Yunus For a girl i will like ayesha For a boy i will like yaseen For a girl i will like Aniqa/Anika For a boy i will like Yaqoob/Yakoob For a girl i will like Anisa/Aneeca For a boy i will like Yamin For a girl i will like Rumina For a boy i will like Raihan For a girl i will like Raheema For a boy i will like Rafsan For a girl i will like Rashid For a boy i will like Sami For a girl i will like Sumayah For a boy i will like Sameer For a girl i will like Sameesha For a boy i will like Saheem For a girl i will like Sameerah Thats all the names i like its just so nice wont you agree?
I have heard I used to sing like a girl . Nick Jonas
Piko is a male Vocaloid character. He is often portrayed as a young boy with a high-pitched singing voice.
i think their is more girl singers because some boys does not like singing and only a little bit wants to sing
Poison by Bell Biv DeVoe