This summer, several musicians have popped up in Milwaukee and Chicago arenas to not only perform but also lend their presidential endorsements at the Republican and Democratic national conventions.

Lee Greenwood sang "God Bless The USA" as former President Donald Trump walked out on the RNC stage last month, and Kid Rock also introduced him. So far, Stevie Wonder, Patti LaBelle and Common are among the musicians who have played live at the DNC in Chicago.

The DNC's roll call on Tuesday celebrated music from each state, with Lil Jon making a surprise appearance to briefly perform "Turn Down for What" and a political remix of "Get Low."

Both conventions, whose purpose is to select the respective political parties' presidential nominees, took on different musical tones via their playlists and live performances. Here's a roundup of everyone who has taken the stage at the DNC and the RNC.

The DNC roll call was a party:Song list, from 'California Love' to 'Texas Hold 'Em'

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John Legend, Pink, Maren Morris will reportedly perform at the DNC

CNN and Rolling Stone have reported that John Legend will introduce the vice presidential candidate Tim Walz to the stage on Wednesday with a tribute to one of Walz's home state's most iconic musicians, Prince.

CNN and Deadline also report Pink will headline on Thursday, the final day of the DNC. Harris will be delivering her speech accepting the party's nomination.

Maren Morris, who started in country music but has since distanced herself from the "toxic parts" of the country music industry, has confirmed she will be performing ahead of Walz's speech Wednesday.

"I am honored to be performing at the Democratic National Convention for the first time ever. It’s a moment where we, as a country, can come together and hear rational plans for the future of women’s and LGBTQ rights," she said in a statement to The Tennessean, part of the USA TODAY Network. "We can be inspired by people’s stories and navigate a safe path forward for our children."

DNC performers: Stevie Wonder, Jason Isbell, Patti LaBelle, Lil Jon, Common

Here's who has performed so far at the DNC:

• Jason Isbell: "Something More Than Free"
• Patti LaBelle: "You Are My Friend"
• Common and Jonathan McReynolds: "Fortunate" and "God Is Good"
• Lil Jon: "Turn Down for What" and "Get Low"
• Mickey Guyton: "All American”
• Stevie Wonder: "Higher Ground"

James Taylor was scheduled to take the stage Tuesday, but his performance was scrapped due to timing.

"It became clear, as the evening unfolded, that there wouldn't be time for our 'You've Got a Friend' with cello and voices. Maybe the organizers couldn't anticipate the wild response from the floor of the United Center," Taylor wrote, in part, in an Instagram post. "Anyway, sorry to disappoint."

Celebrities at the DNC:Lil Jon, Tony Goldwyn, Mindy Kaling and more

RNC performers: Kid Rock

On the third day, Kid Rock introduced Trump to the stage with a version of "American Bad Ass" that incorporated lyrics about the former president.

"He became a friend of mine over the last ten years and he's amazing, everyone loves him," Trump said during his convention speech.

RNC performers: Lee Greenwood

Lee Greenwood made several musical appearances at the RNC. On the first and fourth days, the country singer-songwriter introduced Trump and played him onto the stage with "God Bless The USA."

"You will not take this man down. He has the courage, the strength and he will be the next President of the United States," Greenwood said.

RNC performers: Chris Janson

Country singer Chris Janson, who also performed at the 2016 RNC, played "All American Guy" on the first night.