Keyra Augustina (birth name Julieta Machado) was born on May 15, 1986. Girl lives in Laferrere, Great Buenos Aires. Keyra is an alias of an Argentine woman, who became famous due to homemade photographs and videos that circulated in 2004 on the Internet.

Some believe that the name Keyra Agustina cames from the alias 'Keyra' and 'Agus', which she used to publish her photographs in a forum called Web Argentine Forum of Amateurs (FAA). Because Agustina wanted to remain close with her family and friends, Keyra rarely showed her face in the photos and preferred that the attention is focused on her body and, especially, on her butt. Keyra's homemade photos and videos were taken in her own room using a simple webcam.

Agustina began to gain international fame and recognition when her photographs were unloaded and distributed massively through the internet. Many people, including Howard Stern, called her "Best Ass of the Internet" and the "Best Buttock of the year" (2005). In June of that same year, Maxim of Argentina published a special nine page spread about Keyra. Later, under an "exclusive contract" Agustina appeared in the August issue of Maxim U.S.A. All this took place after an conflict Keyra had with a Spanish website whose owners alleged that the photos were false because the face of Keyra never appeared.