Following news of the untimely death of popular 31-year-old 'Glee' star Cory Monteith, his friends and colleagues took to Twitter in droves to express their shock and sadness.

While a rep for Monteith's girlfriend and 'Glee' co-star, Lea Michele, issued a statement that said simply, "We ask that everyone kindly respect Lea's privacy during this devastating time," other co-stars wrote public tributes -- as did everyone from Taylor Swift to Zooey Deschanel.