On your current playlist, hit shuffle and pick the first ten or twenty songs on the list (no matter how cheesy or embarrassing), and write down your favorite line of the song. Try to avoid putting the song title in the line. Then, have your friends comment and see if they know the songs. There's only one major rule, no Googling. Do your best to peg the artist and the title of the song.
There are no prizes for the winners other than fame and notoriety within the community...that and the fun of picking your brains to recall the words to all those songs you've heard over the years.