Ke$ha performs live on stage during the second day of the Wireless Festival at Hyde Park on July 2, 2011 in London, England. (Photo by Jim Dyson/Getty Images)

(L-R) Daniel Radcliffe, Emma Watson, J K Rowling and Rupert Grint attend the World Premiere of “Harry Potter And The Deathly Hallows: Part 1” held at The Odeon Leicester Square on November 11, 2010 in London, England. (Photo by Dave Hogan/Getty Images)

Visitors to Kensington Gardens are reflected in Anish Kapoor's sculpture “C-Curve 2007” on September 27, 2010 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Lady Gaga performs at Radio 1's Big Weekend 2011 at Carlisle Airport on May 15, 2011 in Carlisle, England. (Photo by Dave Hogan/Getty Images)

Route engineer Richard Winter stands in front of a pile of road salt at the Birchanger Depot on November 8, 2011 near Bishop's Stortford, England. (Photo by Peter Macdiarmid/Getty Images)

Parked scooters and motorcycles in a line on January 13, 2012 in London, England. Statistics showed a 12% increase in scooter registration in 2011, with cost savings on petrol, parking and congestion charge (in London) believed to be the primary factor. (Photo by Matthew Lloyd/Getty Images)

A freshwater stingray pup looks out from a holding tank at Bristol Zoo's aquarium on January 20, 2012 in Bristol, England. (Photo by Matt Cardy/Getty Images)

A 12th century manuscript of The Old Testament sits in the Chained Library of Hereford Cathedral after it's annual spring clean on January 24, 2012 in Hereford, England. (Photo by Christopher Furlong/Getty Images)