you dont have to use photobucket i suggest
imageshack.usthen wen you get there click browse
and then find the image on your computer
then after that click submit or host it (which ever one itis )
then after that wait till its down and scroll down to the bottom and copy the second to the last url(or code that says direct link to image next to it ) and thats the url to the uploaded image
the only reason y i say dont use photobucket is because it makes images smaller