In honor of the Spice Girls' thirtieth anniversary, the UK Royal Mail will release collectible stamp sets. RIA Novosti reports this with reference to a postal statement on the social network. The stamps will go on sale January 11. The most expensive platinum set, limited to a thousand copies, will retail for 200 pounds sterling. The Spice Girls were formed in 1994 in London. Its members included Victoria Beckham, Emma Bunton, Melanie Chisholm, Melanie Brown and Geri Halliwell. Their first album, Spice, sold over 28 million copies worldwide, becoming the best-selling girl group album in music history and one of the most successful albums.