"Ultraviolet" / "The Ballad of Paul K" is the fourth and final single from British pop rock band McFly's second studio album, Wonderland (2005).

25 on the Irish Singles Chart Both tracks were written by McFly members Tom Fletcher and Danny Jones, with "The Ballad of Paul K" being written also by Dougie Poynter, who was the principal writer.

The Ballad of Paul K was based on the members of McFly's fathers.

It is often considered to be in the style of Tim Burton movies, especially The Nightmare Before Christmas and Corpse Bride.

[citation needed] In a TV interview, McFly admitted that watching the video now does scare them slightly.