"30 Rock"'s Incestuous Musical Number (VIDEO)

04/07/2010 05:12 am ET | Updated May 25, 2011

On "30 Rock" last night, Jenna's mother came back into her life after years of abandonment. To celebrate their new-found relationship, Verna threw a surprise birthday party for her daughter, at the end of which they sang a duet they had planned to do decades before. Unfortunately, it was deeply deeply inappropriate...and hilarious.

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This (of course) reminds us of the classic "Arrested Development" moment in which Michael and his niece, Maeby, sing "Afternoon Delight," which similarly ends badly.

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