Sing, Jordan Mailata, sing! On Saturday, the Philadelphia Eagles offensive tackle married his longtime girlfriend Niki Ikahihifo in Maui, Hawaii — and serenaded his new wife with a rendition of Stevie Wonder’s “Isn’t She Lovely.” In a video shared to Eagles Nation, the 26-year-old Australian athlete showed off his powerful, pitch-perfect voice from the dais, while Ikahihifo took to the …