I don't think that either song fits for Footloose, but of the two I'd choose the song from Grease! Do you know any uptempo, fun, pop numbers that you can belt? I can't think of anything in particular, but that's the style I would lean towards for this show.
Currently~ Miss Myrna Thorn in Ruthless! the Musical
Recently~ Emma Carew (Jekyll & Hyde), Sister Mary Leo (Nunsense), Demeter (Cats), Tzeitel (Fiddler on the Roof)