Aldi's "Favourite Things" ad has been voted the most effective seasonal campaign by mums, according to a new study, which found that over a third would shop at the discount supermarket after viewing the spot. Coming close behind was John Lewis' "Man On The Moon" film, which influenced the buying decisions of 31% of mums. The research was conducted by Net Mums' founder Siobhan Freegard's online video community Channel Mum.