I just received this. Are there many versions of this song? I thought I'd be getting the version played on the radio, but it's not, it's the video version

When they did the Scott Mills show, Rob and Mark were singing along to the single, apparently, when it was played, and Mark said he was singing the 'crescendo' (the ahhhhhhh bit) but it wasn't there cos there was an edit, it just went straight to the chorus.

So I was expecting that version. But the ahhhhhhhhhh bit is on the single.

I love the song, whatever version, I was just expecting the radio version cos I assumed that was the single version.
Is there the radio version as well, then?

The version played on the radio, that you heard, is the radio edit. They basically cut out everything thats worthless.
The version you received, i'm guessing a physical copy, is the actual single. If you had downloaded it, it would have said - Radio Edit.