Philadelphia, US - Katy Perry wowed the Democratic convention Thursday night as delegates were treated to an array of musical performances from A-list stars.

The singer performed Roar and Rise in Philadelphia after urging people around the country to back Hillary Clinton. As the pop star walked onto the stage members of the audience, including Bill Clinton, gazed up at her sparkling dress.  Later, 7,500 delegates and special guests - including the Clintons, the Obamas and the Bidens - were treated to a private gig from Lady Gaga, as well as Lenny Kravitz and DJ Jazzy Jeff. The concerts came on a celebrity-filled final day at the convention, with actresses Ted Danson and Mary Steenburgen speaking and the likes of Orlando Bloom among the crowd. Speaking between songs, Perry reminded voters they will have the same power as NRA gun lobbyists come November. 'You'll have as much say as any billionaire,' she added. She even told the audience just to head to the polls so they could cancel out the vote of their 'weird cousins'.

Perry then told the crowd she will be using her voice to vote for Hillary before she started to sing. Holding a star-spangled microphone, she performed the tracks as delegates danced in the Wells Fargo Center. Her rumored boyfriend Orlando Bloom was also supporting from the arena. He took out his cellphone to capture the moment she appeared.

Roar is one of Hillary's campaign songs. She was the cherry on top to a Democratic National Convention that paraded more than a dozen celebrities onstage through its four days.

Perry followed actress Mary Steenburgen, who has been a friend of Clinton for 38 years. She stepped on stage with her husband, Ted Danson, and described Clinton as a 'world-class listener' who's all guts.

Clinton, she said, 'loves to laugh, especially at herself.' When she 'gets knocked down seven times, she will get up eight,' said Steenburgen. After the convention, Hillary and Bill Clinton joined President Obama, Michelle Obama, Joe Biden, Dr Jill Biden and 7,500 other delegates and special guests for a private concert featuring Lady Gaga, Lenny Kravitz and DJ Jazzy Jeff.

AFP adds: Perry was not the only prominent musician to take the stage at the Democratic convention. Folk legend Paul Simon sang on the opening night, while Lenny Kravitz, Alicia Keys, Boyz II Men and Demi Lovato were among the performers. Outside the arena, pop diva Lady Gaga and Snoop Dogg, the hip-hop great and marijuana enthusiast, also entertained delegates.

When a documentary-style biography appeared at the convention to introduce Clinton, the audience heard the immediately recognizable voice of Morgan Freeman.

Other Hollywood A-listers who offered their star power to help Clinton included Meryl Streep, who highlighted the former secretary of state’s historic role as the first woman nominee from a major party for the world’s most powerful job.

“What does it take to be the first female anything?” asked Streep, whose roles have included Margaret Thatcher. “It takes grit and it takes grace.” Actress Eva Longoria took the podium to counter Trump’s attacks on Mexican Americans, noting that her family traces its heritage to the time that Texas was part of Mexico. “My family never crossed a border; the border crossed us,” she said.

Basketball legend Kareem Abdul-Jabbar similarly took Trump to task over his proposed ban on allowing foreign Muslims into the United States as he invoked the guarantees of religious freedom in America’s founding documents.

Comedian Sarah Silverman had one of the most pointed lines among celebrities at the convention.

A former supporter of leftist challenger Bernie Sanders, she chastised the senator’s die-hard backers as “ridiculous” if they did not support Clinton in her showdown with Trump.

But several celebrity backers of Sanders remained unswayed by Clinton, notably actress Susan Sarandon, who said she was “disgusted” by bias against Sanders as revealed in leaked emails by Democratic National Committee members.

The celebrity showing was nevertheless in stark contrast to the Republican National Convention a week earlier in Cleveland. Trump, who served as host of the television reality game show “Celebrity Apprentice,” had promised to bring showbiz glamour and surprises to the convention.

In the end, only a limited number of artists performed in or around the Republican convention including Lynyrd Skynyrd, best known for their 1974 song “Sweet Home Alabama,” and Kid Rock.

Another well-known artist booked on the sidelines of the Cleveland convention was Third Eye Blind - but the group instead used the platform to denounce Republicans on issues including gay rights.

Trump has faced protests from a long list of artists upset that he has played their songs at his rallies including The Rolling Stones, Adele, R.E.M., Neil Young and the estates of Luciano Pavarotti and George Harrison.