Fifth Harmony – National Anthem – Nascar Phoenix (VIDEO) 11/10/2013 mj santilli Fifth Harmony, X Factor 4 X Factor alums, Fifth Harmony, performed an a cappella version of The National Anthem on Saturday, at the NASCAR Nationwide Series race in Phoenix AZ. The girls harmonized beautifully on an arrangement that played with the melody just a little. Nice job kids! The race aired on ESPN2.