As the second presidential debate began, Hillary Clinton chose not shake hands with Donald Trump.

It follows a whirlwind of a weekend where Donald Trump was caught saying vulgar comments on tape and launched a surprise press conference with women who accused Bill Clinton of sexual assault.

While the two greeted each other on friendly terms during the first debate, shaking hands both before and after, tonight proved to be a different experience.

Minutes before the candidates walked out on stage, pop star Katy Perry, a vocal supporter of Clinton, tweeted just that advice.

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Twitter noticed it immediately and knew it meant that tonight would probably be worth watching.

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