99bottlesofbeer.ps1

((((99..1)+'no more')|%{}{$y,$a=" on the wall"," bottle$(,'s'[$_-eq1]) of beer"
"Take one down and pass it around, $_$a$y.`n"
"$_$a$y, $_$a."-replace'^n',"N"}{"Go to the store and buy some more, 99$a$y."})[1..200])|write-host

Nice! You can shorten the code somewhat by using -Begin -Process -End params of foreach-object positionally and assigning vars on the same line:

$b,$w,$n=' bottles of beer',' on the wall','o more'
99..1|%{}{("$_$b$w, $_$b.`nTake one down and pass it around, $($_-1)$b$w.`n"-replace' 0'," n$n")-replace'(\b1 \w+)s','$1'}{"N$n$b$w, n$n$b.`nGo to the store and buy some more, 99$b$w."}|write-host

That's clever! You took mine down below 250 as well!