22-year-old musician Christina Grimmie on Saturday after she was shot dead by an unnamed gunman while signing autographs after a show in Orlando, Florida on Friday. After opening fire, her brother, Mark Grimmie, tackled the gunman, who then turned the gun on himself and died by suicide. 
Shortly after tweeting a news article about the shooting, Wojcicki followed up with another tweet, saying she was, "stunned and saddened to hear the news about Christina Grimmie. A true talent and an inspiration to so many."