This example is using getJSON to fetch lyrics from Vagalume. It's a very complete example using jQuery, but you can make any change you want to match your needs. It's important to keep Vagalume logo and link on your webpage.
Artist and Song name are static on this page, which you could generate from your favourite programming language or even change this code to fech this data somewhere else.
Artist: Madonna / Song: HolidayFetching lyrics...