Maroon 5 lead singer And “The Voice” Coach Adam Levine would love to be able to turn back time before this weekend. Before the crazed gunman opened fire in an Orlando nightclub. And the day before that when another murderer killed up and coming singer Christina Grimmie. The two have been connected since Levine mentored Grimmie on The Voice two years ago. She made it onto the show after developing a huge YouTube following.  Her online popularity has only grown