Chantelle Allison

is an Australian female professional wrestler working under the ring name Shazza McKenzie. She is known for her work on the Australian independent circuit in promotions including Professional Wrestling Alliance where she is a one-time PWA Tag Team Champion and a two-time PWWA Champion currently in her second reign. In addition to her work in Australian promotions, Allison is known for her work in American wrestling promotions including SHINE Wrestling and SHIMMER Women Athletes where she is a one-time Heart Of SHIMMER Champion. Allison began following professional wrestling at the age of 16. She cites Trish Stratus as a major source of inspiration with her combination of "toughness and sexiness". She also has stated her favorite wrestler is Brock Lesnar. Once Allison saved enough money, she devoted her time to training at a local wrestling school.

Once she completed her training in 2008, Allison worked her first professional match for Australasian Wrestling Federation. She spent her early years wrestling solely in Australia from 2008 until 2012 in numerous promotions including Insane Championship Wrestling, Pro Wrestling Australia, Melbourne City Wrestling, Newcastle Pro Wrestling and Riot City Wrestling. Returning in 2015, McKenzie wrestled her former tag partner Veda Scott at SHIMMER Volume 72 where she lost to Scott. She sustained a second loss at SHIMMER Volume 74 by Melanie Cruise. She rebounded with a victory at SHIMMER Volume 75 against Marti Belle. On October 10 at SHIMMER Volume 76, McKenzie lost to Courtney Rush (later known in Impact Wrestling as Rosemary). Later on at Volume 76, McKenzie wrestled in a battle royal for a title match for the SHIMMER Championship but the match was won by Candice LeRae. On October 11, McKenzie wrestled at SHIMMER Volume 78 in a match won by Allysin Kay. Later that day at SHIMMER Volume 79 she won a four-way match, defeating Allysin Kay, Mia Yim and Veda Scott.

During June 2016, McKenzie wrestled in Volumes 81, 82, 83, 85 and 88. She finished out her year in SHIMMER at SHIMMER Volume 89, with a victory over former mixed martial artist Shayna Baszler in a No Disqualification match.