The shape of the X each judge has to use has had four different designs. In seasons one and two, the X was digital and the person's name would be in blue if they buzzed an act. In season three, the X exactly matched the design "Britain's Got Talent" uses. For the beginning of the live shows for the seventh season, the X's edges were sharper. In the next season, the name of the judge would have a white background, instead of blue, the past four seasons, around their name.
You didn't play the guitar, you *murdered* that guitar.