Import from the Text file with your playlists and favourites to Last.fm
Import a list of tracks in Text file to your favorites Last.fm tracks by following this quick guide.
Using a music recommender system called Audioscrobbler, Last.fm builds a detailed profile of each user's musical taste by recording details of the tracks the user listens to.
Soundiiz is the most complete online tool to manage your music library between multiple services. It offers a simple way to import and export playlists and favorites tracks, artists, and albums.