Countries has been drawn from each pot to determine if they will compete in either the first or second semi-final and like in 2010 , it will determine in which half of the semi-final they will perform , in order for delegations to know when rehearsals will begin for their respective countries . Countries will be drawn from each pot to determine whether they will compete in either the first or second semi-final and as in 2010 , which half of the semi-final they will perform , in order for delegations to know when rehearsals will begin for their respective countries .