Twitter Activity Will Affect Vampire Weekend's Concert Live Stream

Indie rock band Vampire Weekend will share new music Sunday night during a concert at the Tribeca Film Festival, and fans not at the show can watch it on YouTube.

The concert live stream, directed by Boardwalk Empire star Steve Buscemi, airs tonight at 9 p.m. ET and is part of the American Express Unstaged concert series

Viewers' Twitter activity during the concert will influence whether the band plays a digital encore.

Viewers' Twitter activity during the concert will influence whether the band plays a digital encore.

If enough viewers tweet reactions to the show using #AmexUnstaged, they will unlock online-only access to Vampire Weekend's post-show antics, which will include a backstage performance of "White Sky" alongside Buscemi and actor Fred Armisen's quirky character Ian Rubbish. Read more...