Twitter has launched its year-end roundup, holding a mirror up to the microblogging world and highlighting the hot topics of 2013. The most retweeted tweet of the year came when Glee’s Lea Michele broke her silence on the death of her co-star and partner Cory Monteith, who died of a heroin and alcohol overdose in July; the tweet peaked at 408,266 retweets, though it’s since fallen to around 394,000.
Thank you all for helping me through this time with your enormous love & support. Cory will forever be in my heart. pic.twitter.com/XVlZnh9vOc
— Lea Michele (@msleamichele) July 29, 2013
The second most retweeted tweet also related to a high profile passing — this time that of Fast and Furious actor Paul Walker, whose death in…