YouTube - Lighthouse Family- High
i cant believe no one mentioned High- lighthouse family.. its like.. the best..
My grade did that last year, it worked quite well actually even though at first I thought it'd be too cliche. I recommend a slowish song like this one because you actually have a chance to hear what people are saying rather than a bunch of muffled words and crying. I personally wanted at the time to use a section of You Get You Give by the New Radicals. I think the F.R.I.E.N.D.s song is pretty cliche too probably but it has a nice tune and if no one can sing at least they can clap
Also use as many school in jokes/references as you can when you change the lyrics because no other schools may get it but it makes it that much more special/personal for your grade
For the sake of it, here's some our last year graduation song to High
*We're all close to tears 'cause we remember
Our days at Hornsby are almost over
It's time to say our last goodbyes
We'll remember our finest hours,
Exercising our senior powers,
Like pushing in at the canteen line...
(Chorus) And though we will not be
Forever, at Hornsby we will
Always keep these mem'ries close to our hearts (our hearts)..."
Or at least that's how I remember those snippets
Couldn't get it out of my head for ages when we sang it at graduation.