Featured post as widget on sidebar

Hi Sakin, I'm testing the design of my website (again) and found out that if I want to put featured post as a widget on the sidebar I must input the post's ID. Where do I get the ID of my post? Or can you just change it so I only need to put the post's link instead of post ID? I'm using catch base pro and you know my web address, right (I posted it several times on my thread on the previous request)?