Lady Gaga is not only one of the biggest pop stars in the world, she is also a philanthropist who uses her fame to elicit change and bring awareness for important issues.

This week, you may have noticed that a photo of the singer alongside five former presidents of the United States has been circulating the web, and there's a very good reason why.

The singer was one of the performers at the "Deep From the Heart" charity concert that was held at Texas A&M University on October 21 in the name of hurricane relief. Since ex-presidents George H.W Bush, Jimmy Carter, Bill Clinton, George W. Bush and Barack Obama were the brains behind One America Appeal, a campaign launched in September for hurricane relief, they were also present at the fundraiser.

Lady Gaga shared the photo on her Twitter page with the caption, "Nothing more beautiful than everyone putting their differences aside to help humanity in the face of catastrophe. #OneAmericaAppeal"

In true Gaga fashion, the entertainer surprised fans by performing three songs before announcing that she would also be using funds from her Born This Way Foundation to help the victims who have experiences mental and emotional trauma.

The concert was broadcasted online and together they raised over $2.6 million to benefit the Houston Harvey Relief Fund, Florida Disaster Fund, Junto y Unidos Por Puerto Rico and The Fund for the Virgin Islands.

The night went without a hitch, but two days later George Bush took to Twitter to express something he wished he had done differently. Barack Obama also got in on the action and things got very interesting.

Two days after the charity concert, the 41st president shared a tweet in which he joked that Lady Gaga should've asked him to sing because he would've taken her up on the offer.

"I would have sung w @ladygaga if asked," wrote Bush.

Bush's tweet received over 99,000 likes and thousands of retweets, but it was Obama's response to the tweet that had everyone talking.

Just a few hours after Bush's tweet hit the web, Obama replied saying that Bush and Gaga should indeed handle the singing, and the rest of them will "handle the donations."

Obama took the opportunity to remind people that there's still time to donate and the tweet garnered hundreds of thousands of reactions from Twitter users.

To date One America Appeal has raised over $31 million and they're hoping to continue the fundraising efforts.

"With damage estimates from Hurricanes Harvey, Irma and Maria topping $300 billion and requiring months and years of rebuilding ahead, we hope this strong start to the One America Appeal is just that "” a start," said David Jones, CEO of the George H.W. Bush Presidential Library Foundation, in a statement.

"The former presidents want to thank each donor who, out of the goodness of their hearts, has given of themselves in such a selfless way to help their fellow Americans," he added.

President Donald Trump was noticeably absent at the event, but he shared a message through a video recording.

"There is a lot of work ahead of us," he said. "Together we will recover. We will rebuild. And we will come back stronger and better than ever before."

You can learn more about One America Appeal and how you can lend a hand on their website.