The real reason, according to what I just made up, for the Niley breakup was that Miley Cyrus was more interested in Joe Jonas, than Nick Jonas.
Joe and Miley had already planned the Niley breakup - poor Nick was trapped ruthlessly into the plot. Joe had tried kissing Miley before, but Miley refused, as she was already with Nick. But Joe pleaded, and Miley was tempted, naturally. She prefers straight flicks to curly bush.
That brought on the Jiley affair, which at present... is going great! Miley was even once with Joe's child, but rumours spoke of abortion. Although, the pop diva did show signs of a slight bump beneath those ultimately jazzy tops of hers! Down at her tummy, she lacks the two she needs, anyway! Jiley needs some serious tips on parenting, if they're keeping the baby.
Stop flirting Demi around, and stop writing so many songs, Joe! Miley, you need that more, about the song thing, not Demi!