Here's what you need to do.
Save this Gif to your computer
Yes it's beiber i know.
ok, now open up any cam program that allows you put any photo as your cam screen.
Go to either chatroulette or omegle and use this as your cam.
Now your want to do this for girls, unless your... you know. But. here's what you want to say.
Stranger:OMG are you the real bieber!! <3
Stranger:Omg i loves your songs"baby baby baby ooh"
You:I'll sing you a song if you want.
You:But first, you must show boobs.
Stranger:You really want me to?
You:Yeah, I'm really dirty behind the seines
Strangerk *shows boobs*
You have left the chat room.
Don't forget to screenie for your own personal enjoyment.
UPDATE: a program you can use for this is manycam just google it.
Also, try to use a proxy while doing this because they can report you.
Ok, people aren't doing this right so i decided for a better tut.
Open your manycam and go to 1sources, then click 2desktop the 3custom desktop numbers are in the picture for better instruction.
then open a new window with the beiber gif.
select the gif as the custom desktop
there your done, now you can suit your needs.