The original version of the song was different from the single, this version was written by Tom and Danny. Its lyrics were "less mature" and resembled a song more suited to the Room on the 3rd Floor album than the new and "grown-up" Wonderland album. The track was therefore edited. It was re-written by Tom and Dougie and re-recorded to be added onto McFly's second studio album, but not before it was featured on the album demo which has subsequently been spread across the internet. The new album version however was still criticised. Its lyrics "I'd destroy the World for you" were deemed inappropriate for a pop song. So McFly edited and re-recorded the song a further time changing the lyrics to "I'll change the world for you" instead.
McFly's video for "I Wanna Hold You" is more mature, removing McFly's signature comedic sketches for a serious performance-based video. The band, suited up, perform the whole video in front of an orchestra of beautiful women in blonde wigs. During the guitar solo, a woman appears to rise through the ground before McFly, dripping with a metallic looking paint.