Put the URL in Image tags like this [ /img]. For example yours would be written like this
[img]
[B]avatar.xboxlive.com/avatar/[I]CiiGO[/I]/avatar-body.png[/B][*img] (but dont add the *)
It should give you this
[IMG]http://avatar.xboxlive.com/avatar/CiiGO/avatar-body.png
:thumbup: