Over the years, the British hard rock band Uriah Heep has released 25 studio albums (of original material), 20 live albums, 41 compilation albums, 27 UK singles (33 worldwide) and 17 videos. The band's best selling album is Sweet Freedom, which was released in 1973 and its worldwide sales are more than 6 million copies. Uriah Heep's progressive/art rock/heavy metal fusion's distinctive features have always featured massive keyboards sound, strong vocal harmonies and (in the early years) David Byron's operatic vocals. Twelve of the band's albums have made it to the UK Albums Chart (Return to Fantasy reached No. 7 in 1975) while of the fifteen Billboard 200 Uriah Heep albums Demons and Wizards was the most successful (No. 23, 1972). In the late 1970s the band had massive success in Germany, where the "Lady in Black" single was a big hit. With Black Sabbath, Deep Purple and Led Zeppelin, Uriah Heep became one of the top heavy metal and hard rock bands of the 1970s. Studio albums Live albums Compilation albums {|class="wikitable" style="text-align:center;" |- !rowspan="2"| Year !rowspan="2" style="width:210px;"| Album details !colspan="6"| Peak chart positions !rowspan="2"| Certifications(sales thresholds) |- !style="width:3em;font-size:85%"| AUT !style="width:3em;font-size:85%"| FIN !style="width:3em;font-size:85%"| GER !style="width:3em;font-size:85%"| NOR !style="width:3em;font-size:85%"| SWE !style="width:3em;font-size:85%"| US |- |1976 |align="left"| The Best of Uriah Heep Released: February 1976 Label: Bronze, Mercury (SRM-1-1070) | 8 | — | — | — | 47 | 145 |align="left"| BVMI: Gold |- |1985 |align="left"| Anthology Released: 1985 Label: Parlophone / Elektra | — | — | — | — | — | — |align="left"| |- |1986 |align="left"| Anthology Volume One Released: April 1986 Label: Legacy | — | — | — | — | — | — |align="left"| |- |1988 |align="left"| Collection Released: 1988 Label: Legacy | — | — | — | — | — | — |align="left"| |- |rowspan="3"|1989 |align="left"| The Collection Released: 1989 Label: Castle | — | — | — | — | — | — |align="left"| |- |align="left"| Ironstrike: 14 Rock Hard Hits Released: 1989 Label: Avanti | — | — | — | — | — | — |align="left"| |- |align="left"| Milestones Released: 1989 Label: Castle | — | — | — | — | — | — |align="left"| |- |rowspan="2"|1990 |align="left"| Still 'eavy Still Proud Released: April 1990 Label: Legacy | — | — | — | — | — | — |align="left"| |- |align="left"| Two Decades in Rock Released: June 1990 Label: