I came across a similar network of fake accounts a while back. This search pulls up about 40 fake accounts:

https://twitter.com/search/realtime?q=Lil+sis+is+up+coughing...

Interestingly, with each search I'd click through to the user account, search for another of the tweets made by the same account, and find yet more unique fake accounts. I started compiling a list, but gave up when it reached a few hundred.