The presenter and musician - who famously showered in a bikini in the Australian jungle as a contestant on I'm A Celebrity ... Get Me Out Of Here! - will be seen in new series Singing In The Rainforest.
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Also taking part in the five-part series, which looks at how different worlds can be brought together with music, are Scottish indie-rock act Glasvegas.
Klass, who found fame as a member of chart-topping group Hear'Say, visited the Ulithian people on the Micronesian island of Mog Mog, with her grand piano having to be specially shipped out to the location which has no running water or electricity and is accessible only by boat.
Glasvegas headed to Bameno in Ecuador - which is a two-day canoe journey from the nearest road - to write and perform with the Huaorani people. The band's equipment had to be paddled in to the area to allow them to write music with their collaborators.
Three other artists will take part in the series which will be broadcast by digital channel Watch next year. The resulting piece of music is performed at a finale concert for the local people, and a recording will be available for download after the programmes are screened, with the tribes taking a share of the income.
The programme was announced at a season launch for UKTV this morning which was attended by former Baywatch and Knight Rider star David Hasselhoff, TV naturalist Sir David Attenborough, actor David Bradley and comics Ross Noble and Dave Gorman.