Perhaps it's fitting how much Dannielynn Birkhead loves rollercoasters when you consider the tedious climbs and sharp descents that marked her first year of life. 

There was the untimely passing of half-brother Daniel Smith, who overdosed while visiting mom Anna Nicole Smith and her newborn daughter in a Bahamian hospital, and the eerily similar death of the larger-than-life former Playboy model just months later.