How to Display Most Commented Post in Blogger

1. Log into your Blogger Account and go to Edit HTML

 <Group description="Most Commented" selector=".most-commented">

<Variable name="most.commented.background1" description="background color1" type="color" default="#fa4242" value="#ee377a"/>

<Variable name="most.commented.background2" description="background color2" type="color" default="#ee6107" value="#fcad37"/>

<Variable name="most.commented.background3" description="background color3" type="color" default="#f0f" value="#f8e000"/>

<Variable name="most.commented.background4" description="background color4" type="color" default="#ff0" value="#c7e93d"/>

<Variable name="most.commented.background5" description="background color5" type="color" default="#0ff" value="#5ebded"/>

</Group>

Look for

 ]]></b:skin>

 Paste the code below above the </b:skin

 .comment-count {
    padding: 3px 10px;
    background: #fff;
    color: #000;
    font-size: 10px;
    float: right;
}
.most-commented ul {
    padding: 0px !important;
    font-family: Century Gothic, sans-serif;
}
.most-commented ul li {
    list-style-type: none;
    padding: 10px;
    color: #555;
    margin-top: -10px;
}
.most-commented ul li a {
    color: #444;
    font-weight: bold;
    text-decoration: none;
    font-size: 11px;
}
.most-commented ul li img {
    float: left;
    margin: 0px 5px 0px 0px;
    width: 60px;
    height: 60px;
}
.most-commented:nth-child(3n+0) {
    background: $(most.commented.background1);
    width: 100%;
}
.most-commented:nth-child(4n+0) {
    background: $(most.commented.background2);
    width: 95%;
}
.most-commented:nth-child(5n+0) {
    background: $(most.commented.background3);
    width: 90%;
}
.most-commented:nth-child(6n+0) {
    background: $(most.commented.background4);
    width: 85%;
}
.most-commented:nth-child(7n+0) {
    background: $(most.commented.background5);
    width: 80%;
}

 <script type="text/javascript">
function stripTags(s,n) {
    return s.replace(/<.*?>/ig,"").split(/\s+/).slice(0,n-1).join("")
}
function mostcommented(feed) {
    var i;
    for (i = 0; i < feed.count ; i++) {
var postURL = "'" + feed.value.items[i].link + "'";
var postTitle = feed.value.items[i].title;
var postthumbnail = "<img src="+feed.value.items[i].postthumbnail+" />";
var postDescription = feed.value.items[i].postdescription;
var postComments = feed.value.items[i].commentcount;
var postList = '<div class="most-commented"><ul><li><div class="comment-count">' + postComments + "</div>" + postthumbnail + "<a href="+ postURL + '">' + postTitle + "</a>" + '<p>' +stripTags(postDescription,10)+'...</p>' + '</li></ul></div>';
 document.write(postList);
     }
 }
 </script>
<script src="http://pipes.yahoo.com/pipes/pipe.run?
AddUrlHere=YOUR BLOG URL
&NumberofPosts=5
&_id=2cb5eb603ed55a6264ee1484e5fdd45c
&_callback=mostcommented
&_render=json"
type="text/javascript"></script><span style="font-size: 80%; float:left;"><a href="http://helplogger.blogspot.com/2014/08/most-commented-posts-blogger-widget.html">Add this widget</a></span>

enter your YOURBLOGURL  with your own blog url. And replace the 10
increase or decrease the digit to show the post description.

Most Commented post Without Thumbnail

 <script type="text/javascript">
function stripTags(s,n)
    {
    return s.replace(/<.*?>/ig,"").split(/\s+/).slice(0,n-1).join("")
}
function mostcommented(feed) {
 var i;
 for (i = 0; i < feed.count ; i++)
 {
var postURL = "'" + feed.value.items[i].link + "'";
var postTitle = feed.value.items[i].title;
var postComments = feed.value.items[i].commentcount;
var postList = '<div class="most-commented"><ul><li style="margin-bottom: 10px"><div class="comment-count">' + postComments + "</div>" + "<a href="+ postURL + '">' + postTitle + "</a>" + '</li></ul></div>';
 document.write(postList);
 }
 }
 </script>
<script src="http://pipes.yahoo.com/pipes/pipe.run?
 AddUrlHere=YOUR BLOG URL
&NumberofPosts=5
&_id=2cb5eb603ed55a6264ee1484e5fdd45c
&_callback=mostcommented
&_render=json"
type="text/javascript"></script>
<span style="font-size: 80%; float:left;"><a href="http://helplogger.blogspot.com/2014/08/most-commented-posts-blogger-widget.html">Add this widget</a></span>