April 1 - April 7, 2012 (55 images)

Elton John, Meryl Streep, Sting and James Taylor perform a song from The Wizard of Oz at the Revlon Concert for the Rainforest Fund at Carnegie Hall in New York City on April 3, 2012. UPI/John Angelillo

Jennifer Hudson performs at the Revlon Concert for the Rainforest Fund at Carnegie Hall in New York City on April 3, 2012. UPI/John Angelillo

Republican Presidential hopeful Mitt Romney speaks to supporters at a rally on April 3, 2012 in Milwaukee, Wisconsin. Wisconsin, along with Maryland and Washington D.C. held their primary elections on Tuesday. UPI/Brian Kersey

New waxwork figures of Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are revealed at Madame Tussauds in London on April 4, 2012. UPI/Paul Treadway