U.S. alternative act Vampire Weekend performed two new songs at U.K.-based indie XL Recordings' presentation for Q3 and Q4 releases at London's Institute of Contemporary Arts (I.C.A.).

The New York band performed "White Sky" and "Cousins" at the conclusion of the XL showcase. It is putting the finishing touches to the as-yet-untitled follow-up to "Vampire Weekend," the best-selling indie debut album of 2008 in the U.S.

The set moved 334,000 copies in 2008 according to Nielsen SoundScan. It has since built up sales above 500,000 in the U.S., according to XL, which has a worldwide deal with the band.

No date is yet confirmed for the new album, recorded in Brooklyn, although the band has stated its intention for a fall release date.

The XL presentation did reveal release dates for several key releases, including the first album from the influential Gil Scott-Heron since 1994's "Spirits." "I'm New Here" will be released on Jan. 11, 2010.

Footage of the White Stripes' concert film "Under Great White Northern Lights" was also shown at the I.C.A. The film will premiere on Sept. 19 at the Toronto International Film Festival ahead of a DVD release.

Indie-dance band Friendly Fires' self-titled debut album will be re-released with the addition of the new single "Kiss of Life," the video for which was screened at the I.C.A.

U.K. dance duo Basement Jaxx will release its new album, "Scars," on Sept. 21, two weeks after the single "Feelings Gone" featuring Sam Sparro, while youthful London alternative act the XX releases its debut "XX" album on Aug. 17 via Young Turks/XL. The XX also performed at the July 3 showcase along with new signing Holly Miranda.

XL will continue to promote new releases from Jack Penate and the Horrors.