Fifteen stamps are being issued by Royal Mail in the U.K. to mark the iconic girl group's milestone anniversary. The former girl band, who are the sixth music group to feature in a dedicated stamp issue, said in a statement, "We are so excited to be celebrated by Royal Mail, alongside some of the most iconic and influential music legends. When we formed the Spice Girls we couldn't have dreamt that 30 years later we would be the first female group to be dedicated an entire stamp collection, that's Girl Power!"