To celebrate 2013, YouTube invited some of its most popular contributors to star in a mashup of popular moments this year. Can you spot all the references?
in Viral Videos
WATCH: The infamous video from Beyoncé's hit single pairs perfectly with the cartoon theme song.
An effort is underway to restore the Louisville home where the boxing legend grew up.
It's your chance to live like a music legend.
Dozens of crew and cast members, including Jim Parsons and Kaley Cuoco-Sweeting, have raised more than $4 million for "The Big Bang Theory" Scholarship Endowment.