This hack probably is one of the oldest blogger hacks ever.

So easy, Just do this steps;
1. Go to your Dashboard
2. Go to Template Tab
3. There you will see a widget manager. Click Add a Page Elements on the section you want to place the recent comment.
4. Now you should see a list of widget elements you can pick. click on the Add to Blog Button under HTML/Javascript. this element is useful if we want to add a 3rd party functionality or other code. so we pick this. remember to choose this elements each time you need to add third-party codes.
5. Now you should have a new popup window open,
- Leave the title blank
- And go to the content area.
- Copy this Code and paste on that widget content area.
please note: you should change the "http://YourBlogNameHere.blogspot.com" on the code with your own blog url.
6. Click Save Changes
7. Refresh your blog and done.