How can i calm my sister down ?

My sister is a huge fan of Aerosmith they're her favorite band besides KISS. She has a huge crush on Steven Tyler she was mad at him when she saw videos of him kissing his girlfriend. She said he's the only guy she wants she said that's her boyfriend she said its not fair she said he's cheating on her. She's acting like that girl that cried over Justin Bieber only she's worse. All she wants is to go on one date with him and get a kiss from him. She can't even listen to them right now she's too upset. She said she needs him she's going through a rough time right now she said she's depressed hes the only one she wants to be with she said he broke her heart. It's after 11 I can't get her to go to bed she won't stop screaming and crying. She seen videos online where he kisses his female fans she said if she got a kiss from him she be the happiest girl in the world. How can I calm her down ?