Add CC in PHP Mailer not working

Im trying to send on email to user using AddAddress and another three emails to admin and so on by CC .
I can send out email using AddAdress() But not using Add CC.
Below is my code.

<?php
require("class.phpmailer.php");

$mail = new PHPMailer();

$mail->IsSMTP();  // telling the class to use SMTP
$mail->Host     = "mail.test.com.my"; // SMTP server

$mail->From     = "[e-mail]";
$mail->AddAddress($email);

$mail->Subject  = "Colourful email";
$mail->Body     =$message;
/*$mail->WordWrap = 50;*/
$mail->AddCC    =($email_1);
$mail->AddCC    =($email_2);
$mail->AddCC    =($email_3);

if(!$mail->Send()) {
echo 'Message was not sent.';
echo 'Mailer error: ' . $mail->ErrorInfo;
} else {
echo 'Kindly check your email for the confirmation of your rental.Thank you.';
}

?>

Answer

You dont need to = in this

$mail->AddCC($email_1);