Some common songs for the uke are "somewhere over the rainbow", "Can't help falling in love", and "riptide". They are amazing and sound wonderful on the ukulele. But those songs can be difficult to play, so, stick to easy stuff first. Once you get the hang of some uke basics, you can go over to a website called ukutabs.com and you will find A TON of modern (and old) songs to play on your ukulele!