The headphones allow the singer to listen to their own voice, the accompaniment or click track so they know if they are on pitch and where they are in the song.
Yes, but not professionally
yes, but not professionally.
no
not all the way.
Yes, with an integrated microphone.
Professionally since 2002 when she won Popstars: The Rivals.
No, only people can talk. Headphones merely reproduce sound.
People cannot sing well when listening through headphones because 1) they are potentionally really bad singers to start with and/or 2) because they cannot actually hear themselves singing they are unable to adequately harmonise with the music which is in their ears. I mean, this is my very basic and slightly musically educated assumption. I'm sure someone will be able to give a much better explanation but I hope this helps somewhat.
Yes she can sing very very well.She started singing professionally when she was 15.Look it up on camp rock
Jessica Alba is a famous actress. She has appeared in several movies. She does sing in some of her movies, but does not sing professionally.
Céline has been singing all her life but she started professionally at the age of 12.
Miley started singing at about 3 but she started professionally singing at 11.