Thanks to Twitter and the speed of digital media, the news of last night's Indiana State Fair stage collapse tragedy broke very quickly. Within hours, fans who attended the Sara Bareilles/Sugarland concert were texting, tweeting and Twitpicing images and videos of the stage, which fell on top of concert attendees, killing five and injuring over 40. Pop stars reacted to the terrible news as well -- Kevin Jonas, Train, Cody Simpson, Jordin Sparks and more sent tweets containing well wishes to those injured and thoughts to the families of those who died. See your favorite artists' tweets about the stage collapsing at the Indiana State Fair.