I've heard that Man Utd have confirmed to sign Zaha for 15 mil. Pounds.Does anyone know about this news?

Yes. its all over the news. Last I read, he is/will soon undergo medicals. 

Were that sources reliable?

I mean those.lol

http://www.bbc.co.uk/sport/0/football/21180202

BBC is generally reliable. he will play for Palace for the rest of the season though.

The fee is 10 mil

United will pay 5 mil more if he does well at the club.

It's official - Willy's joining the club, but will remain in Crystal Palace for the rest of the season! Good luck, kid!

Does anyone think he will play in the CL next year?