http://www.youtube.com/watch?v=6m5TuxdkfkE&feature=player_embedded#
I wonder what these parents think of these children singing about guns, being torn into pieces and thrown into a fire, and just a random assortment of WTF. I doubt any of them get why they mention Black Mesa, or even cake.

I think the cake made the parents feel all warm and fuzzy.
This is adorable.

Oh my, you just made my day!

I'd love to see a Portal themed Chistmas Nativity! :D
But a Portal play would suffice just as much!
I loved the video! *Thumbs Up!*

There should be a Portal musical at Broadway and the West End. Hell, a massive epicly long Valve game musical featuring the best parts of all Valve games, from HL to Portal to HL2 to L4D to even TF2.

I prefer Victims of Science - The Device Has Been Modified

I think it's a parent. By natural law, parents recording their child singing in a show must be the worst camera operators EVER.

I hate that song, at least now it has better vocals though. [And the whole unhealthy Portal hype.]
Robot voices were a bad idea back when Alan Parson's Project tried them, and they had some good music hidden behind those vocals, now we know, why nobody remembers their I Robot..

That was awesome, although it does demonstrate the complete and utter failure of autofocus in low-light conditions.
It reminds me of another performance of the song I saw once. Press Play On Tape played it at a gig in April 2008. They played the song, and had the entire audience sing the lyrics. Sadly, no videos of this exist, at least none that I've been able to find.

It's made me feel all tingly inside too.