So you know that theory that I floated the other day about the Britney Spears performance being an attempt by MTV to get this year’s Video Music Awards “noticed” by the blogs by having something utterly trainwrecky open it up? Yeah, well, I think that Mariah Carey is taking a similar tack with this appearance she made yesterday, where she’s introducing a stamp honoring … jury duty. If only she’d brought along an ice-cream truck! [DListed]