Is it permissible to perform Ghusl while taking a normal shower, using soap and shampoo simultaneously? Does this impact the validity of the Ghusl?
Yes it permissible to perform Ghusl while taking a shower using soap and shampoo. You need to have the intention of performing Ghusl for the sake of Allah, then making water reach to your head and neck, then the right side of your body then the left side of your body.
Wassalam.