The 'Rocket Man' singer spent two nights in intensive care after becoming "violently ill".
Spandau Ballet are set to perform in America at the 2014 South by Southwest Festival, marking their first Stateside appearance since 1985.
The group achieved international success in the 1980s but they took a long break in 1990 before releasing a comeback album in 2009.
They have since taken part in a documentary about the band which will debut at the festival in Austin, Texas on 2 March 2014, and the group are set to perform on the same day to celebrate the film's world premiere.
The group hopes the documentary will launch its U.S. comeback, with plans to release a greatest hits album and embark on a Stateside tour for the first time in almost 30 years, according to Billboard.com.
Watch Spandau Ballet’s music video for 'True' below: