Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. 2 (Olivia Newton-John album) - (2) is the nineteenth studio album by Australian pop singer Olivia Newton-John released on 12 November 2002 in Australia. A duets album the majority of tracks are with Australian artists along with two American performers (Richard Marx and Michael McDonald). The Peter Allen and Johnny O'Keefe duets are built around archive recordings with new vocals added by Newton-John.
A:
Album