Following the tragic news of Amy Winehouse's death, many music stars are understandably distraught. Rihanna, Demi Lovato, Sean Kingston and more took to Twitter to tweet their thoughts on the 'Rehab' singer's unexpected death. While Nicki Minaj couldn't wrap her head around the loss, Big Boi couldn't help but point out the '27 club' -- the fact that Amy Winehouse died at the age of 27, just like legends Kurt Cobain, Janis Joplin, Jim Morrison and Jimi Hendrix before here. See the tragic tweets about Amy Winehouse's death from your favorite music stars.