Sibling Thing on 'Relative Madness'

Thrust into a privileged (and dangerous) social environment by their former rock star father, the Humphrey siblings are now hopelessly entangled with the social A-List at their new school. Dan (Penn Badgley) is romancing Serena van der Woodsen – a social queen bee returned from exile. Younger sister Jenny (Taylor Momsen) challenged the reigning social queen, Blair, with disastrous results.

Watch SOAPnet's Relative Madness -- It's a Sibling Thing countdown this Thursday night to see if Dan and Jenny top the list!