multiple count functions in a select statement

Hello list

I'm a MSSQL convert and I'm running postgresql 7.2

I'm trying to create a statement in which display multiple counts on a table

In MSSQL I would use

select
count_1=(select count(ad_code) AS "CP" from leads where ad_code = '555'),
count_2=(select count(ad_code) AS HED" from leads where ad_code = '222'),
etc

I've searched the docs but to avail.

Any help, suggestions, pointers, would be appreciated

Thanks

Jeannie