Cyrus told Jimmy Kimmel that the fan has been invited to fly out to Los Angeles and spend the summer living with Cyrus' mother, Tish. Cyrus and the superfan swapped phone numbers months ago and have been texting back and forth since.
The fan, Cyrus says, is always in the loop and knows how to promote her music.
''I don't know if this is how it works for you, but no one ever tells me anything. I'm the last to know everything," Cyrus said.
"I didn't know about a schedule today, I didn't know what time I was going to be here, I didn't even know I was going to sit on this couch and talk to you. I thought we were going to just do everything outside."
Cyrus expects the fan to become her right-hand girl.
''She's more than a stalker because she's so obsessed. She knows things about how to break VEVO records, which we did with her help. She just knows... I don't know anything, I don't YouTube or whatever, so she knows what has to be done in what amount of time to be number one or to break the record. She just knows everything.''