Off-balance sheet (OBS), or Incognito Leverage, usually means an asset or debt or financing activity not on the company's balance sheet. Some companies may have significant amounts of off-balance sheet assets and liabilities.
Their fourth studio album, â¦Hysteria was released in 1987, and topped the charts in both the US and the UK. Hysteria spawned six hit singles, and the album sold over 20 million copies worldwide. Def Leppard has released 10 studio albums as of 2011, and continues to be one of the top-selling artists in the industry.
After over three years of recording, Def Leppard's fourth album, Hysteria, was released on 3 August 1987. The first single from the album, . Animal , became the band's first Top 10 hit in the UK, reaching No. 6 on the UK Singles Chart.n April 1992, Def Leppard appeared at the Freddie Mercury Tribute Concert at Wembley Stadium, London, performing a three-song set of Animal, Let's Get Rocked and Queen 's Now I'm Here with guitarist Brian May.