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.。

Via Giphy。

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.。

Mashable Top StoriesStay connected with the hottest stories of the day and the latest entertainment news.Sign up for Mashable's Top Stories newsletter。By signing up you agree to our Terms of Use and Privacy Policy. 。By signing up you agree to our Terms of Use and Privacy Policy. 。

Thanks for signing up! 。

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

Tweet may have been deleted。

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

Tweet may have been deleted。

Tweet may have been deleted。

Tweet may have been deleted。

TopicsDonald TrumpElectionsHillary Clinton。