The group performed their new single 'What About Us' on The Tonight Show with Jay Leno.
Other guests on the show included Billy Connolly and Nicki Minaj, who discussed her role as a judge on the new season of American Idol.
'What About Us' will be included on The Saturdays' debut US EP 'Chasing The Saturdays', which will be released on January 29. Their UK album The Chase follows later this year.
The group's new reality series - also called Chasing The Saturdays - begins on E! in the US on January 20 and the UK on February 3.
Group member Una Healy recently recalled meeting Justin Bieber on an American TV show, admitting that he had "baby-soft skin".
Watch the 'What About Us' music video below: