Getting data from a website using Invoke-WebRequest - powershell

Question

I have a website http://www.rnbtop99.com/chart which I am trying to capture the list of songs, by artist and title.
I have the this simple PowerShell script as a start:
$site = Invoke-WebRequest -Uri 'http://www.rnbtop99.com/chart'
Start-Sleep -Seconds 5
However, I am confused of all the different Tag/Class/ID, how to match them up on the site to using PowerShell's functions and arrangements that I need to use as the various options to capture the data, e.g.
$site.ParsedHtml.body.getElementsByTagName('div')
$site.ParsedHtml.body.getElementsByClassName('?')
Intellisense tells me I can use these options above, Tag/ClassName etc.
In Chrome using the inspect option it says for the artist - class="artist-name ng-binding" however if I run $site.ParsedHtml.body.getElementsByClassName('artist-name ng-binding') then it returns nothing.
Would be good to know also for future the best way for any site, where I can use either the Edge/Chrome the inspect option to get the correct element ID/Tag/ClassName then match up with the correct options to use in PowerShell to capture any data e.g. Document/ParsedHtml/All/Body/InnerHTML/InnerText etc etc.

Answer 1

try this :
$r=iwr http://www.rnbtop99.com/api/chart/charts.json
$j=$r.Content |convertfrom-json
$j.Previous.Tracks |%{"$($_.track.title) BY $($_.track.artist.name)"}

Answer 2

This is my final script pieced together with the help of all in this post. Just 4 lines, very nice. Small, but very effective.
$r=Invoke-WebRequest "http://www.rnbtop99.com/api/chart/charts.json"
#Invoke-WebRequest seems to treat application/json as a byte stream
$j=-join($r.Content-as[char[]]) |convertfrom-json
$j.Previous.Tracks |%{"$($_.track.artist.name) - $($_.track.title)"}