You can put instructions in your will as you as you wish. Your Solicitor or Trustee Company will provide advice on the outcome on your death. Succession Law can be difficult to negotiate.
Family Provision, within the Succession Act, is designed to protect family members that may be wrongly done...
Never been a Karaoke person, however my favourite tune to sing around the fire is “King of the Road” by Roger Miller. Couldn’t sing to save myself, but had fun trying .