Selena Gomez has revealed she’s battling bipolar disorder.The singer and actress shared the news with pal Miley Cyrus during a candid chat on the Wrecking Ball hitmaker’s Bright Minded Instagram Live show on Friday, explaining she learned about her mental health condition during a visit to Massachusetts’ McLean Hospital.Gomez told her friend and viewers that the more information she gathered about being bipolar, the easier it was to deal with the diagnosis.“When I have more information, it actually helps me,” she said. “It doesn’t scare me once I know it… When I finally said what I was going to say, I wanted to know everything about it and it took the fear away.“When I was younger, I was scared of thunderstorms and my mom bought me all