Who most commonly sang the fastest-selling single by an Australian artist as a duet?
Anthony Callea Anthony Cosmo Callea (born 13 December 1982) is an Australian singer-songwriter and stage actor of Italian descent (parents Santina and Cosmo) who rose to prominence after being the runner-up in the 2004 season of "Australian Idol". Callea's debut single "The Prayer" is the fastest-selling single by an Australian artist, held the No.1 spot on the ARIA Singles Chart for five weeks, a record for the debut single of an "Australian Idol" contestant, and was the second-highest selling Australian single of the last decade.
The Greatest (Sia song) "The Greatest" is a song recorded by Australian recording artist Sia for the deluxe edition of her seventh studio album, "This Is Acting" (2016). Being made available for digital consumption as the record's third single on 5 September 2016 through Monkey Puzzle and RCA Records, "The Greatest" features the vocal collaboration of American rapper Kendrick Lamar. The electropop and tropical house song was written by Sia, Greg Kurstin, and Lamar while production was solely handled by Kurstin. The solo version was written solely by the former two.