Justin arrives at the "Declare Yourself" party in Beverly Hills. Declare Yourself is the national nonpartisan, nonprofit campaign to energize and empower every eligible 18-year-old in America to register and vote in the 2008 presidential election. For more information, visit www.DeclareYourself.com.br br Later, Justin Timberlake exits Club Opera in Hollywood with a friend. Looks like he had a pretty entertaining evening.