Last update, january 2017:
Google launched a new online photo service called " Google Photos " 2 years ago which is basically replacing Picasa.
It's now possible to access the service from your Pix-Star!
Please note that Google does not allow third parties like us to access pictures from shared albums inside Google Photos (same as Facebook) this is for privacy protection reason most probably.
So you can only access your own albums that are stored inside your Google photos account.