LeakedSource added 43,570,999 records to their database on Thursday. In March of 2012, Last.fm issued a warning to users, encouraging them to change their passwords. In 2012, the music service admitted the account passwords were unsalted and hashed via MD5. The leak was large, and four years later they’ve surfaced in the public. In just over two hours, Leaked.Source had cracked about 96 percent of the Last.fm list, revealing passwords such as ‘lastfm’, ‘password’, ‘abc123’, ‘iloveyou’, and everyone’s favorite ‘123456’”]
Source: https://www.csoonline.com/article/3114779/43-million-last-fm-records-compromised-in-2012.html