Looks like you have been waiting for help for some time so I hope this might be of some use.
There is an app on the Google play app store that seems to meet your needs.
It does not show a price so I assume it is free supported by adds.
It claims to have the ability to tweet what your listening too.
I don't know if you will be able to see it in the market on your Tab but here is the URL so you can see it on a PC otherwise. https://play.google.com/store/apps/deta ... tter&hl=en
If you can get and install it and it is any good, make a post back here to tell others about it.