The Auckland-based six-piece purveyors of rock, roots, reggae, funk and ska-fused melodies approached organisers about two months ago when they heard about the festival and because of the reputation of co-organiser Chris Cole, of Brisbane.
Mr Cole is managing director of Australasian Music Corporation, which set up and promoted concerts by U2, INXS, UB40 and James Brown, among others, as well as Groove In The Park from 2003 to 2005.
Band manager Veronica Browne said dDub had received a great deal of support from Queenstown since the group started in 2003.
"Even though we're an Auckland band, we feel we've been adopted by the South Island.
"There is a real need for more festivals in the South Island. The more festivals you have the more support you get.
"We're very excited about being on board Peak Festival because it has a great fresh line-up."
Also confirmed for the one-day music festival are Australian dance scene rising stars The Potbelleez, hip-hop DJ Sir-Vere plus house DJs Sam Hill and General Lee.
They join five-piece blues roots crowd-pleasers Kora, pioneering dub act Salmonella Dub and chart-topping British dance duo Utah Saints.
The festival will occupy two stages at the Queenstown Events Centre (QEC), with the main stage on the cricket oval and the indoor stadium transformed into the Ministry of Sound room.
Reveal Event Management director Samantha Stirling, of Queenstown, is the Wakatipu co-ordinator.
"The whole idea behind the festival this year is we want to keep it to homegrown acts and try to encourage people to stay for another day after New Year's Day and promote the destination as a whole."
Earlybird tickets are on sale for $75 plus booking fee until the allocation runs out, then will rise to $89 plus booking fee.
Tickets are available at QEC, Queenstown i-Site, national Ticketdirect outlets and the Peak Festival website.
"We are fortunate that we have such a large venue with an almost unlimited outdoor capacity, about 20,000, so, because of this large space, of course we want more sales simply so that we can have more people there to enjoy the event."
Children aged 12 and under are free of charge, if accompanied by a full-paying adult.
Access to the Ministry of Sound room requires adult supervision for people under 15. It will be a licensed area with up to 20 market stalls selling food and beverages.
Sponsor Red Bull will have a tent on site and sponsor Good Water will open an inflatable bar.
