Oliver Hartmann is known as the singer/ guitarist/ sideman of metal megaseller Avantasia, for projects like Rock Meets Classic, and as ex-At Vance singer and front man of the successful German Pink Floyd tribute Echoes. His band Hartmann is considered as one of the best modern German Rock-/ Hard Rock acts. The band has released eight successful albums, has toured with acts such as Toto, Uriah Heep, The Hooters, House of Lords and will celebrate their 15th anniversary this year. In clebration of their anniversary, Hartmann now release this new album, which was coproduced by Sascha Paeth (Avantasia, Beyond The Black, Kamelot).This special release includes five new songs, five well chosen cover tracks and five live versions of Hartmann songs that were recorded over the last years. '15 Pearls & Gems' contains the singles 'Walking On A Thin Line' and the duet 'When The Rain Begins To Fall', a special cover version of the 80's pop classic featuring Ina Morgan, member of Avantasia and one of Germany's greatest female rock vocalists. The live recordings also include the outstanding duet 'Brothers' feat. Avantasia's mastermind Tobias Sammet on vocals - originally recorded as a studio version for the album 'III' (2009).