Pop culture dominates this week in photos: Britney Spears makes her X Factor debut, prisoners dance to "Thriller" in Peru, and Grease comes to life in London.
People take part in a sunset yoga session as the Tribute in Light shines over the Brooklyn Bridge over the East River on the 11-year anniversary of the 9/11 attacks in New York. The Tribute in Light is an art installation near the site of the World Trade Center in remembrance of the 9/11 attacks.
A model presents a creation from Project Runway alum Christian Siriano's Spring/Summer 2013 collection during New York Fashion Week.
Apple Senior Vice President of Worldwide Product Marketing Phil Schiller announces the new iPhone 5 during an Apple special event at the Yerba Buena Center for the Arts on Sept. 12, 2012 in San Francisco.
President Barack Obama holds on as he is hugged and picked up by Big Apple Pizza owner Scott Van Duzer in Fort Pierce, FL, while campaigning across the state by bus.
Catherine, Duchess of Cambridge, and Prince William, Duke of Cambridge, watch a dancing dragon as they attend a cultural event in Queenstown on day 2 of their Diamond Jubilee Tour of the Far East in Singapore.
Athletes stand together on the Queen Victoria Memorial during a parade of British Olympic and Paralympic athletes in front of Buckingham Palace in central London.
Judges L.A. Reid, Simon Cowell, Britney Spears and Demi Lovato leave their signatures in cement at the Season 2 premiere of The X Factor at Grauman's Chinese theatre in Hollywood, CA.
129 women dressed as Escaramuzas, also known as cowgirls, break the world record for the most Escaramuzas performing at the same time at the Minerva roundabout in Guadalajara. The Escaramuzas are part of La Charreria, a type of a rodeo which has been a national sport since 1933.
London-based Future Cinema transformed Barnes Common park into Grease's fictional setting of Rydell High School. Over 9,000 participants, donning 1950s attire, were expected at 3 showings over the weekend.
Serena Williams of the US poses with her trophy after defeating Victoria Azarenka of Belarus in their women's singles finals match at the US Open tennis tournament in New York.
Prisoners dressed as zombies dance to Michael Jackson's "Thriller" in the inauguration ceremony of their own version of the Olympic Games at Lurigancho's men prison in Lima. The country's jail authority runs the 10-day tournament to help the integration of prisoners back into society, according to the organizer.
A Chinese carpenter presents his self-made wooden electric car at the 2012 China-Eurasia Expo in Urumqi, Xinjiang Uygur. The electric vehicle is able to travel up to 130 km on a single charge and has a top speed of 50 km/h.
The Singapore Merlion is lit up with fireworks and projected light patterns during the Merlion's 7-minute 40th anniversary show at Merlion Park in Singapore.
DeJon Gomes #24 of the Washington Redskins intercepts a ball over Lance Moore #16 of the New Orleans Saints during the season opener at Mercedes-Benz Superdome in New Orleans. The Redskins defeated the Saints 40-32.
Young Lipizzaner stallions leave the village's church after they were blessed on their way from the Alps to their winter stable in Maria Lankowitz. Their return home to the Federal Stud Piber is traditionally celebrated before some of the colts are selected for training at the Spanish Riding School in Vienna.