A recorded segment for tonight's episode (November 3) saw Scherzinger visit the shop with Douglas, who used to work there before entering the singing competition.
Scherzinger said to the 21-year-old singer: "I want to see what your life was like before this."
Wearing the supermarket's uniform, Scherzinger got to grips with a piece of equipment that identified levels of stock, saying: "I've never done this, this is exciting!"
Douglas joked about the experience, saying that "going back [to ASDA] with Nicole was odd. She did enjoy it to the point where I thought, future prospects...". He also added that he believed Scherzinger was the "perfect mentor".
In the aisle of ASDA, Scherzinger also announced on the shop's PA: "If you vote for Jahmene this weekend, everything is half off in the store."
Watch Jahmene Douglas perform 'Listen' on The X Factor below:
Photo gallery - The X Factor number ones week:
Copyright: Ken McKay/Thames/Rex Features