TORONTO - Pop music superstars Mariah Carey and John Legend will headline a two-hour `Canadian Idol' season finale.
CTV says Carey and Legend will perform on the results episode, airing live Sept. 10, along with Canadian rockers Hedley, last year's `Idol' champ Brian Melo, and `Idol' mentor, R&B singer Jully Black.
And in a new twist, viewers will get two days instead of one to decide who will be the next singing Idol.
The show's two finalists will compete in a final performance episode on Sept. 8.
Four men are left in the competition - Mitch MacDonald, 22, of Port Hood, N.S.; Earl Stevenson, 23, of Lloydminster, Alta.; Theo Tams, 23, of Lethbridge, Alta.; and Drew Wright, 28, of Collingwood, Ont.
The Final Four will be mentored by legendary songstress Anne Murray, who performs in Tuesday's results episode along with `American Idol' winner Jordin Sparks.
