Twitter corpus for Sentiment Analysis from a class (cs224n)at Stanford.
Class page:
https://sites.google.com/site/twittersentimenthelp/for-researchers#Where_is_the_Tweet_corpus_8553
http://www.stanford.edu/~alecmgo/cs224n
J. Moore, S. Chen, D. Turnbull, and T. Joachims. Conference of the International Society for Music Information Retrieval Conference (ISMIR), page 401-406. (2013)