This is a fun little song called Riptide and has all the chords you should all know quite well now! This clip shows you when to move on to each chord, it's mainly 2 strums on the Am & G and 4 on Cmajor. 

If you really want to challenge yourself, you could try and learn to play and sing the song!

 

https://www.youtube.com/watch?v=oGRywmICVYw