NEW YORK (AFP) - Top US musicians took to social media on Tuesday (Nov 8) urging fans to vote after a presidential campaign in which celebrities overwhelmingly backed Democratic candidate Hillary Clinton.

Pop superstar Taylor Swift - who had been silent about the election - posted a picture of herself on Instagram dressed casually as she waited in a long line at a polling station.

Although Swift - who performed at the 2008 Republican convention but generally stays out of politics - encouraged voters to come to the polls, she did not reveal her own choice.

Katy Perry, often seen as Swift's rival, is Mrs Clinton's self-described "number one fan". On Election Day, she posted repeatedly on Twitter, where she has nearly 94 million followers, more than anyone else.

In one video, Perry appears with a fluffy little dog asking voters to head the polls.

She also posted a commercial for Mrs Clinton set to Roar, in which a diverse array of Americans sway to her blockbuster tune, urging a "vote against hate".

Perry also waded into politics in her home state of California by supporting a proposition that would fully legalise marijuana. She linked to an opinion piece by rap mogul Jay Z, who argued that the failed US "war on drugs" has disproportionately targeted minorities.

Jay Z and his wife, pop diva Beyonce, led a concert for Mrs Clinton on Friday in the battleground state of Ohio. Beyonce on Tuesday posted a short, cinematic video from the show to her 88 million Instagram followers.

"So many people lost their lives for us to even have the opportunity to vote," Jay Z said at the end of the video.

It would be a "major disservice if we don't go out and let our voice be heard", he added.

Republican candidate Donald Trump, who enlisted few celebrity supporters, criticised Mrs Clinton for appearing with Jay Z and Beyonce, pointing to the rapper's use of profanity.

Mr Trump nevertheless campaigned with hard rocker Ted Nugent, who grabbed his own genitals to illustrate his view of Democrats.