I am trying to retrieve the new, "bust" profile picture of a player (the one where it displays your character without any gear item equipped and faces the right side).
According to the wiki article on Web APIs, you have to use that given url to retrieve a JSON table, which you can decode later. That's exactly what I'm trying to do here:
local imageLabel = script.Parent --ImageLabel Object
local myJSON = game:GetService('HttpService'):JSONDecode('http://www.roblox.com/bust-thumbnail/json?userId=17030889&height=180&width=180')
imageLabel.Image = myJSON[1]
myJSON should look something like this:
{"Url":"http://t4.rbxcdn.com/6fa936d8b4dc1b86d98f0143bbf20788","Final":true}
However, all I get is an error saying Can't parse JSON.
The wiki article on JSONDecode says that the JSONDecode function does not require HttpEnabled to be true, but I tried it with it both on and off just to be sure, and it still doesn't work.
In addition, I also tried using double-quotes instead of single-quotes for the url, and it still doesn't work.
What am I doing wrong here?

10 comments
1.) You are using JSONDecode on a string. 2.) To obtain the result from the website, HTTPEnabled must be enabled to use 'GetAsync' 3.) You can't access Roblox-links directly from Roblox.
Directly from the wiki article on JSONDecode (which I linked in my post, too), it says, "Decodes a JSON string into a Lua table. Does not require HttpEnabled to be true."
YOU DECODE THE RESULT FROM THE URL. JSONDECODE ONLY WORKS ON A JSON, NOT ON A URL.
Nevermind. DataStore actually explained it in more depth in the answer below, so I understand what you mean now.
you better
I do, because there are people that are better at explaining than you.
I didn't explain it though. I merely pointed out errors. Perhaps learn the difference between 'listing' and 'explaining.'
Maybe learn the difference between a comment and an answer too, k? Don't put up a smartass attitude here if you can't even interpret a simple wiki article.
Maybe learn the difference between teaching someone who has a learning gap and straight up insulting them, "k"? I'm sorry for asking a scripting question on a scripting question-asking website. I doubt you understand everything the first time you read something, too, so don't act like you're above everyone else.
...and just the fact that you down-voted my reputation shows how salty you are. Would you like some pepper with that salt?