Pretty old school this now, but an early fav. The challenge was to launch an exciting range of Mediterranean dips to NZ. (Back in the day when fancy hummus was a BIG thing). The problem was they were called Lisa's and there was nothing exotic sounding about them.
Not only did this campaign allow us to prank call supermarkets, but years later Lee-Sas was still being joked about by Kiwi's when they took their favourite dip to a party. Making into the vernacular was a pretty sweet thing.