Add X Factor winner

X + X=? Last night’s X Factor season-closer brought back the 12 finalists for one big production number, “The Edge of Glory,” which offered the opportunity to assess how Cowell, L.A. Reid and company did as A&R/talent scouts. Of those, it would seem at least four or five, including dimpled America’s sweetheart Rachel Crow, tyro rapper Astro, Swiftean girl next door Drew, song and dance man Marcus Canty, pop-country outfit Lakoda Rayne and even sexagenarian soul singer Leroy Bell, have legitimate shots at careers in one genre or another. (12/23a)