PHP/MYSQL Help – unexpected T_VARIABLE-Collection of common programming errors

I am trying to make a edit profile page and i want the user to be able to change there username and email address. I’ve been going at this problem now for sometime and need your help.

Parse error: syntax error, unexpected T_VARIABLE

$edit = mysql_query("UPDATE users (Username, EmailAddress) VALUES('".$newusername."', '".$newemail."') WHERE UserID="$_SESSION['UserID']"");