Another selection of would-be stars are given a chance to demonstrate their unique talents, as the fourth round of auditions gets under way. As always, Simon Cowell, Amanda Holden, David Walliams and Alesha Dixon will beckon each act into the spotlight, where they must show off their skills to the best of their ability if they are to secure the panel's attention and win a place in the next round of the contest. However, for those performers whose skits capture the hearts of either the judges, or Ant and Dec, a simple tap of the golden buzzer could see them progress straight through to the live shows.