Reddit reviews Opera's Greatest Mothers

Here are some websites that seem to have good suggestions:

http://www.broadwayworld.com/board/readmessage.php?thread=1059022

http://www.thedailybeast.com/articles/2012/10/14/barbra-streisand-jason-gould-plus-more-famous-family-duets-video.html

http://www.amazon.com/gp/aw/d/B0000064XX?pc_redir=1414510936&robot_redir=1

Not sure if those are necessarily right for you, but maybe it will give you some ideas?

Here is the non-mobile link from the comment above
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