To celebrate 2013, we invited some YouTubers to star in a mashup of popular moments this year. Can you spot all the references? WATCH THE TOP VIDEOS OF 2013:

Pope Francis takes part in service at 9/11 museum's Foundation Hall.

As part of the Queen Elizabeth II 60 years Diamond Jubille a morph sequence video of her life was created.

Gino Bartali was a famous Italian cyclist who won twice the Tour De France and during the Second World War helped saved the lives of 800 Jews. His incredible story was told 10 years after his death.

Experts say the “bayou city” is so vulnerable to floods — not only because it is low-lying — because explosive growth in the metro area has added 25 percent more pavement in the last 15 years, replacing soil-rich wetlands that could absorb water with concrete suburbia.

The 9/11 museum aims to pay tribute to those who lost their lives that day. Local Projects founder Jake Barton gives us a personal tour of the space built to remember, to educate and, most importantly, to create community.

El Lic. Jose Gerson (Marzo 3, 1918 - Octubre 20, 1963) emigró a la Ciudad de México en el 1928 de Vinnitsa, Ucrania. Llego con sus padres Abraham y Fanny Gerson, acompañado de sus cuatro hermanos: Samuel, Salomón, León y Pedro. Este video incluye un artículo publicado en la Prensa Israelita después

James shocked his partner with a surprise engagement using the piano at London's St Pancras International. Luke had no idea he was about to be involved in the most romantic wedding proposal of the year. TopSecret loved creating this and it is one of the best gay wedding proposals we've done. Huge co...

In a very emotional dedication ceremony, President Barack Obama praised the new Sept. 11 museum on Thursday May 15, 2014 as "a sacred place of healing and of hope" that captures both the story and the spirit of heroism and helpfulness that followed the attacks. He said: Terrorism Can't Break Us.

The best videos of Youtube during 2012 all in one.