Euphoria is the seventh studio album by English hard rock band Def Leppard, released in 1999. The album aimed to return to their signature sound made famous by the band in the 1980s. It was produced by the band with Pete Woodroffe. The album charted at No. 11 on The Billboard 200 and No. 11 on the UK Albums Chart. The album is also known for including the song "Promises", which hit the number one spot on Billboard's Mainstream Rock chart. The pop metal tune has been performed on numerous tours since, with 440 plays according to Setlist.fm publicly.
Following Slang, the band was initially unsure of which direction to take for their next release, upon reconvening in April 1998.
The band would enlist the aid of former producer Robert John "Mutt" Lange for four days in a more limited role. Three songs were co-written with Lange, who lent background vocals (as he had on other albums): "It's Only Love", "All Night" and "Promises".
A song first recorded by Vivian Campbell's side band Clock, "To Be Alive", received a Leppard makeover. For the first time since 1981's High 'n' Dry, an instrumental was included (Phil Collen's "Disintegrate"). This instrumental was known before as "Spanish Sky", a ballad that evolved into this track.
In its first week of release, Euphoria sold over 98,000 units in the US and just missed the Top 10 of the Billboard 200, reaching No. 11. First single "Promises" topped Billboard's Mainstream Rock chart in June 1999, a spot the band had not held in six years.
Euphoria would later be certified gold in the US, Canada and Japan. The album-supporting tour stretched from May 1999 to September 2000.
Upon the album's ten-year anniversary in June 2009, The Record Review noted that "the band has yet to match it with any release since (despite the stiff competition of 2002's X) and it still stands between leaders Hysteria and Pyromania as the band's best album."