Euphoria [SHM-CD] is the seventh studio album by Def Leppard, originally released in 1999 as part of the BACK TO 90s ROCK HR/HM series, following the band's experimental album Slang. With Robert John "Mutt" Lange returning to participate in the songwriting process, the album delivers a strong, polished return to Def Leppard's classic, arena-ready sound and is widely regarded as a high point of their late-career output. The release includes the hit single "Promises" and is presented on SHM-CD, complete with liner notes, full lyrics, and Japanese translations.