I have been an EYFS teacher for a little over 10 years and I also use songs in my classroom. Whether it's tidying up or lining up, I find that it really helps the children listen to you more. And when they are being noisy or just super chatty my go-to favourite song to make then listen to me is 'If you're happy and you know it!'. I just sing it loudly and they usually clap their hands and then wait for my next instruction. Also like someone suggested earlier, when you notify them that they will transition into the next activity, it usually helps the children know what's going on. I usually do the count down from 5 mins, then 2 mins and then 10 secs. I hope this is useful!