The model's sister Christy DeWeese and her twin brother Billy shared the devastating news with , confirming she died of an apparent suicide on Wednesday, April 15.
Nobody should be left alone like that.
Christina - named Playboy Cyber Girl of the Week on May 4, 2009 - was of Russian, German and Swedish heritage, and had also starred in shoots for Victoria's Secret and Maxim.
The decision to close the print edition was attributed in part to the which interfered with distribution of the magazine.
She is said to have left a note, though further details remain unknown.
Mattingly moved home to Texas to be closer to family but was still about four to five hours away from her kin.