- "You've Got A Friend", "You Can Fly" (Guys)
- http://www.youtube.com/watch?v=I_hsWuirT2M
- Music Man(Guys)
- http://www.youtube.com/watch?v=TbBITrZa6Ok
- And So It Goes (Girls) (Meh)
- http://www.youtube.com/watch?v=UZc7tvCWXFE&feature=related
- Mary Did You Know (Girls)
- http://www.youtube.com/watch?v=NVxsO5giBjU&feature=related
Just go to YouTube if you're interested and just keep clicking till you find one you like.
You're bound to like at least one quartet (:
