I realize there’s some debate over what can and can’t be sung at public high school events, but a “musical rendition of ‘The Lord’s Prayer'” should make anyone‘s list of obviously-promoting-Christianity-and-therefore-illegal music. It’s not an instrumental ode to God. It’s not a classic song that has withstood the test of time. It’s just a song you’d expect to hear in a megachurch on a Sunday morning.
Who would argue otherwise?