The challenge gets bigger as the Dominoes get smaller! Watch as 2,000 mini Dominoes (which are 80 times smaller than full size Dominoes) topple for a Guinness World Record.
A look back on some of the Hollywood headlines that made history.
Reality TV star Michael "The Situation" Sorrentino pleaded not guilty to federal tax fraud charges.
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The pop star is reportedly taking boxing lessons from Floyd Mayweather ... and Conan O'Brien has the footage.