GOP's Fiorina shows off a lighter side on 'The Tonight Show'

Republican presidential candidate Carly Fiorina impressed many with her strong performance in the second presidential debate, as she railed passionately against Planned Parenthood and outlined her hardline views on foreign policy.

But she showed off a lighter side during a taping of "The Tonight Show Starring Jimmy Fallon," set to air Monday night.

Fiorina, the former Hewlett-Packard CEO who has jumped to second-place in several public opinion polls, ends her appearance on the show by sharing a song she'd made up about her lazy dog, Snickers, who would prefer to sleep than take walks.

"My name's Snick and you're going to have to carry me," she sang to the tune of "Rock Around the Clock," earning loud applause.

Fiorina, one of a long list of Republican hopefuls, has been working to introduce herself to a broader group of voters.

She also took several jabs at current GOP front-runner Donald Trump, including comparing him to Russian President Vladimir Putin.

"The two of them have a lot in common, actually," she said of Trump, drawing laughs from the crowd.

Fiorina talked about meeting Putin while the two were waiting to speak at an event in Beijing.

She described Putin as "a formidable adversary," who was "bursting out of the buttons of his shirt," but could be "quite funny and charming."