Fiorenza's Father is a Preacher and she moved numerous times as a child, living in Waddy, Kentucky before moving to Midlothian, Virginia with her father when her parents' marriage ended. After graduating from Clover Hill high school in Midlothian, she studied at Virginia Intermont College. Fiorenza attended the University of Kentucky. At the end of 2005, Fiorenza was involved in a car crash and though not seriously injured, it led to her embracing religion.
Fiorenza won the Miss Virginia Teen USA 2005 title on October 30, 2004, after competing in the pageant for the first time. Her sister titleholder was Jennifer Pitts, Miss Virginia USA 2005.
Fiorenza represented Virginia in the 2006 Miss Teen USA pageant held in Baton Rouge, Louisiana on August 8, 2005. She initially made the semi-finals in the nationally televised pageant, and competed in the evening gown competition. She then advanced to the top ten, and competed in swimsuit. Fiorenza top ten placement was Virginia's first placement since Kristi Lauren Glakas made the top ten in 1999.
Fiorenza passed on her crown to Samantha Casey of Jeffersontown on November 12, 2005. Casey had been her first runner-up in the 2005 state pageant.
In 2007, Fiorenza won the Miss Virginia USA 2008 title, the third consecutive Miss Virginia Teen USA to do so, and represented Virginia in the 2008 Miss USA pageant.
In 2007, Fiorenza participated in the MTV reality television series Road Rules 2007: Viewers' Revenge as part of the "pit crew", which competed for a part on the show. At the end of the first episode, Fiorenza became the first member of the pit crew to join the Road Rulers crew in the "RV" when she won a challenge against Veronica. Fiorenza remained with the RV crew until the end of the show, which lasted 15 episodes. For making it to the final mission, Tori and the other five members received the handsome reward which included money the crew had won doing different challenges during the show, as well as a Mazda3.
Due to her appearance on Road Rules, Fiorenza was asked to be part of the cast competing for over $400,000 in prizes (including the final mission) in 2008's Real World/Road Rules Challenge: The Gauntlet 3, on MTV. In the process of the game, Tori expressed her strong dislike for the team she was in, particularly against Frank and Jillian. This was caused by the fact that Tori was sent into a Gauntlet match against her good friend Melinda. Tori nearly quit the competition before going into the match but in the end decided to participate. Tori won the match and returned to the Rookies team. Fiorenza was also part of the six remaining castmembers on the Rookies team which competed in and won the final mission worth $300,000. During this Challenge, She met her future husband Brad Fiorenza, who was a competitor in the opposite team.
In 2009, Fiorenza competed on the Real World/Road Rules Challenge: The Duel 2 alongside fellow contestant and now husband Brad. They reported on the Duel II reunion special that they were still engaged. The two married on April 12, 2010.
Fiorenza appeared again as a contestant on The Challenge: Cutthroat with her husband Brad. They both were part of the winning team in the final mission and won $40,000 each. Tori gave birth to couple's first child, John Brady Fiorenza, on August 4, 2011, and the couple's second child Chase Fiorenza on January 13, 2015. As of late 2016, it is reported that the couple is separated and living apart.