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Justin Timberlake, Jessica Biel

Stephen Lovekin/Getty Images

You can never forget your roots.

And for Justin Timberlake and Jessica Biel, that includes the chart-topping boy band 'N Sync and family dramedy 7th Heaven, where these two stars first got their names known. 

So now that these two are gearing up for their wedding, we wonder if their buddies from the past will be present? In fact, we wonder a lot of things about J.T.'s head-bobbing bros and Biel's TV family.