The former Sugababe will perform an assortment of new material at the launch of London's Jacques Townhouse on July 19.
The show will be the first opportunity for fans to find out what Buchanan has been working on since she was replaced by Jade Ewen in the Sugababes back in September 2009.
Buchanan told the Daily Star: "I'm a bit nervous about going solo but I'm still really excited for people to hear my stuff."
A handful of tracks by the 26-year-old singer-songwriter have leaked over the past few months, including 'Gimme Pressure', 'Under Control' and 'Fearless'.
Listen to 'Gimme Pressure', which addresses Buchanan's exit from the Sugababes, below: