View Click Stats on Bitly or Goo.gl Short URLs

You may already know that you can view click stats on Bitly short URLs by adding + to the end of the URL, like this:

http://bitly.com/LH9pqK+

But did you know adding + also works for any other service that shortens their URLs through Bitly, like Amazon?

http://amzn.to/wZsYV5+

You can also view data on Google short URL clicks by inserting the shortened ID of a goo.gl URL into a longer Google URL like this (I find that I have to click this link twice to see the metrics):

http://goo.gl/#analytics/goo.gl/9bHF1/week