The band performed the songs taken from their forthcoming album Ceremonials, which will be released in the UK on October 31 and the US on November 1.
The Florence Welch-fronted group showcased 'Never Let Me Go', 'Spectrum' and 'Heartlines' during their set at New York's Creators project on Saturday night (October 15).
All three of the tracks were co-written by Welch and produced by Paul Epworth.
The 'Shake It Out' act recently announced plans to play a one-off show in London at the Hackney Empire.
Tickets for the show sold out in just 60 seconds when they became available on Friday (October 14).
However, the group have since confirmed that fans across the globe will be able to pay £3.99 for a live stream of the gig via The Guardian website.
> Florence + the Machine's new album 'Ceremonials' - First listen
Watch Florence + the Machine perform three new tracks live below:
'Never Let Me Go'