Musically at least, she sees deeply into the human heart. Yet the more this ability ennobles her and makes her famous and successful...the less time she can spend with ordinary people, and, progressively, her extra insight into the human heart includes sensing how few people have her depth.
She now has at least one foot into adolescence. I seriously doubt whether she's thought about this consciously yet, but who will she be able to even date when she's old enough to do that? She doesn't go to school. She know a few girls who are her childhood friends. Most of the boys she knows are siblings or cousins.
So on both the practical and the philosophical level, she's coming to realize the degree to which her life of the heart separates her from other hearts. And there's not much she can do about it. She is who she is. Even if she stopped performing now, she'd still be herself, with the abilities she has, whether she uses them professionally or not.
When she's 16--the age her mom identified as when she'd be willing to let her start dating--most boys her age will be too intimidated to ask her out, and unwilling to be identified as someone's boyfriend instead of the girl being identified as his girlfriend.
At her current age of 12, the dating stuff is well over her horizon. But she's insightful. Surely in some way she sees it coming, and she already experiences it. Who are the fans cheering her from those expensive front row seats? Old coots mostly, who will never be in her dating pool. And boys her age are mostly listen to Rihanna and Pink and Fergie and Selena Gomez and Beyonce and Lady Gaga and Kei$ha etc....not her.
She will find love, eventually, to be sure. But it will be a challenge. And even outside of the world of romance...it's always lonely at the top. Whether it's as a CEO or as a prima ballerina or as a potter on the crafts fair circuit or as the top cop in your precinct. Being the best at anything isolates you.
Hence, perhaps, the undertone of sadness in much of her music. Her way of seeking the consolations of philosophy...