Tracklist front / back album covers
1. "Now" 3:58
2. "Unbelievable" 3:58
3. "You're So Beautiful" 3:31
4. "Everyday" 3:08
5. "Long, Long Way to Go" 4:38
6. "Four Letter Word" 3:07
7. "Torn to Shreds" 2:56
8. "Love Don't Lie" 4:46
9. "Gravity" 2:33
10. "Cry" 3:17
11. "Girl Like You" 2:49
12. "Let Me Be the One" 3:29
13. "Scar" 4:59
UK/Japanese bonus tracks
14. "Kiss the Day" 4:27
15. "Long, Long Way to Go" (acoustic) 4:43
Def Leppard Band Members / Musicians
Rick Allen – drums
Vivian Campbell – guitar, vocals
Phil Collen – guitar, vocals
Joe Elliott – lead vocals
Rick "Sav" Savage – bass guitar, vocals
Eric Carter – keyboards and drum loops on "Now", "You're So Beautiful" and "Everyday"
Stan Schiller – shredding tele licks on "Gravity"
Producers: Def Leppard, Per Aldeheim, Andreas Carlsson, Pete Woodroffe
Engineers: Stefan Glaumann, Richard Chycki, Ronan McHugh, Liz Sroka, Pete Woodroffe
Mixing: Marti Frederiksen, Ronan McHugh, Pete Woodroffe
Mastering: Tom Coyne
A&R: Simon Collins, Jeff Fenster
Production co-ordination: Leslie Langlo, Sue Tropio
Editing: Brian Paturalski
Vocal producer: Ronan McHugh
Drum technician: Jerry Johnson
String arrangements: David Campbell
Programming: Ronan McHugh, Pete Woodroffe
Photography: Clive Arrowsmith
X (pronounced ten) is the 8th studio album by English rock band Def Leppard, released on 30 July 2002 by Island Records in the US and sister label Mercury worldwide. Much like 1996's Slang, it featured another departure from their signature sound by moving into the pop genre. The album charted at No. 11 on The Billboard 200 and No. 14 on the UK Albums Chart. Most of the album was produced by Pete Woodroffe and the band, with remaining tracks produced by either Marti Frederiksen or Per Aldeheim and Andreas Carlsson.
This is the first Def Leppard album in which drummer Rick Allen actively took part in song-writing. On all of the band's prior albums, he is only credited with helping co-write three tracks. On this album alone, he co-wrote eleven. The album is also the first from the band to include original songs not to be written by any of the members: "Unbelievable" and "Long, Long Way to Go", the latter of which was released as a single.
The album features the Roman numeral 'X', recognising it as their tenth album release, although the album is in fact only their eighth collection of all-new studio material. The other two albums released by the band prior to the release of X, Retro Active and Vault, were a rerecording of B-sides and rarities and a greatest hits set respectively.
The album peaked at number 11 on the Billboard 200, but did not sell to the standards of their previous releases and failed to earn any RIAA certifications. With the exception of an abbreviated version of "Now" being performed as part of an acoustic medley during the Rock of Ages Tour in 2012, nothing from this album was performed live by the band since the conclusion of its supporting tour until their Las Vegas residency in 2019.
For a short time after the album was released, Def Leppard's website Defleppard.com featured a free mp3 download of "Perfect Girl," a bonus track and early version of the track "Gravity".
