Last.fm, online music site with free music streaming, photos, lyrics, videos, concerts and many more. Last.fm homepage does not shows any information regarding this hack.
LeakedSource was able to confirm that email address, usernames, passwords, newsletter sign-ups, join-date and ad-related data, were stolen in the breach.
The stolen passwords from Last.fm were stored using unsalted MD5 hashing (hashing is a method for encrypting data for better security). LeakedSource reported that, it took only two hours for them to crack and convert over 96% of them to visible passwords.