Miley Cyrus is suffering from a heart condition, it isn't life threatening, reveals her autobiography.
In her new autobiography, 'Miles to Go', the 'Hannah Montana' star has written that she has tachycardia, which means that her heart rate exceeds the range of a normal resting heart rate.
"The type of tachycardia I have isn't dangerous. It won't hurt me, but it does bother me. There is never a time onstage when I'm not thinking about my heart," The New York Daily News quoted Miley as saying in the tome.
In fact, the Disney star has dedicated an entire chapter in the book to "Prince Charming," whom she hasn't named but is believed to be Nick Jonas.
The teen starlet has revealed that she wooed her first love by recommending they sing a duet from "The Jungle Book" together.
She also disclosed that when they broke off, she penned "7 Things I Hate About You" in his honour.