Cast — including Robert Pattinson, Kristen Stewart, Taylor Lautner — to appear on show.

By Eric Ditzian

You probably thought we were done with the blockbuster 2009 Video Music Award announcements. After all, we’d already hit you with news that Beyoncé, Jay-Z, Lady Gaga and Taylor Swift would be performing live at the at the September 13 show. But guess what? We’re about to drop a pop-culture bomb of OME proportions.

“Twilight” stars Robert Pattinson, Kristen Stewart and Taylor Lautner will appear on the show to debut an exclusive expanded trailer for “New Moon,” the second film in Summit Entertainment’s vampire saga.

We’ll repeat that slowly for you: Fresh “New Moon” footage. Pattinson. Stewart. Lautner. Boom!

The film’s first trailer premiered during this year’s MTV Movie Awards, and now the 26th annual VMAs are shaping up to be another bonanza for devoted Twilighters. On the day of the show, MTV.com will debut the first single off the “New Moon” soundtrack, the Death Cab for Cutie tune “Meet Me on the Equinox.” Based the second book in Stephenie Meyer’s supernatural series, “New Moon” is set for release on November 20, while the soundtrack drops on October 20.

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