Tonight's show will see the former Emmerdale actress being held by her ankles while her skating partner Daniel Whiston spins her around high in the air and low down near the ice.
The stunt has been attempted by Bonnie Langford, Suzanne Shaw and Lisa Scott-Lee in previous years.
"Roxanne has been practising the move all week with a crash helmet on and the last time she did it she hit her head," an insider told the Daily Star Sunday. "She also cut her elbow on the blade of Dan's skate during training and had to bandage it up so she didn't bleed on the ice.
"Even professional skaters struggle with this move so it's no surprise she's a nervous wreck about it."
Pallett confirmed: "I've watched other celebrities such as Bonnie Langford and Suzanne Shaw do the move so I feel under pressure."
Dancing On Ice continues at 6.50pm tonight on ITV1.