Many people are shocked when a former All-American pop idol ends up as a scandal-plagued tabloid punch-line. But they shouldn't be, because it has been happening for years.

The names may change, but the "Behind The Music" remains the same. Like a bottle rocket soaring to astonishing new heights and lighting up the night sky, only to eventually run out of juice and come crashing down onto the neighbor's roof, thus is the trajectory of a pop star.

Let's take a closer look at the trajectory of a female pop star.