Apps keep freezing while downloading

I've previously managed to download several apps onto my iPad without issue, but the last couple of times I've tried, they seem to have frozen part way through downloading. I now have two app icons stuck on 'Waiting' on my screen, that I can't get rid of. I'm not too fussed about either of the apps - I just want to get rid of the icons, but can't. If I hold down, all the other icons start to do the shaky thing with the cross in the corner, but those two don't. I've tried a soft reset and that didn't get rid of them either. Any suggestions? Thanks in advance.