The girl group, who will release their second single 'Black Heart' in the UK on June 17, debuted a new mix of the track exclusively on Digital Spy.
The performance, which was shot at London's Red Bull Studios, sees the trio switch into an upbeat version of the song partway through.
'Black Heart' is the second cut to be lifted from Stooshe's debut album Swings and Roundabouts, which is due out later this year.
Stooshe will support Nicki Minaj during her headline UK tour later this month. The jaunt begins at London's Hammersmith Apollo on June 24.
Watch Stooshe perform an acoustic rendition of their new single 'Black Heart' below: