VENICE, ITALY - SEPTEMBER 05: Actress Selena Gomez attends the "Spring Breakers" Premiere during The 69th Venice Film Festival at the Palazzo del Cinema on September 5, 2012 in Venice, Italy. (Photo by Ian Gavan/Getty Images)

Poor Sel. 

When Selena and her best friend went through kidney transplant surgery, we only saw the heartwarming photos.

Turns out, things did not go as planned. What went on behind the scenes was an emergency surgery for Selena that saved her life. Check out the scary story.