Shoppers can win one of 100 exclusive nail polishes every day for 12 weeks.
Ten million packs of Special K cereal will also include a £5 voucher towards a Nails Inc. manicure.
The Nails Inc. campaign is part of Special K’s ongoing association with fashion. It has previously collaborated with designer Ted Baker to create a Special k red dress and handbag.
Kellogg’s and Nails Inc. are also running a sub-campaign with Asda to create a limited edition ink box and pink nail polish as part of Asda’s Tickled Pink activity in support of charities Breast Cancer Care and Breast Cancer Campaign.
Nails Inc. has previously partnered with Diet Coke and Cadbury to create limited edition colours and bottles.