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Mariah to headline 'Canadian Idol' finale
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 Wednesday, Sept. 10 at 8 pm ET, 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.