Swg.fm is a twitter version of Swagi.com, a music website. You can simply tweet your favourite song without any signup. Just give your twitter ID, song name , artist name and name of song and tweet the song with a tweet button,
you will be redirected to your twitter homepage with a link of song on your tweet box. Just make a click and share your favourite song and make your followers listen and watch your favourite song.
Just look the snapshots for more clarification :