US First lady Michelle Obama addresses the Democratic National Convention in Philadelphia, Pennsylvania, US July 25, 2016. [Photo/Agencies]

Michelle Obama became the top searched speaker of the night on Google. On Twitter, about 40 tweets mentioning the first lady were posted every second, according to social media analytics firm Zoomph.

The president lauded her performance. "Incredible speech by an incredible woman. Couldn't be more proud & our country has been blessed to have her as FLOTUS. I love you, Michelle," he wrote in a Twitter post, using an acronym for first lady of the United States.

His tweet became the most re-tweeted post of the night.

Michelle Obama, a lawyer who has advocated for military families and working women during her seven-and-a-half years as first lady, has earned a reputation for inspirational speeches.

Last week, during the Republican National Convention, Trump's wife Melania delivered a speech that appeared to borrow phrases from Michelle Obama's convention speech in 2008, drawing accusations of plagiarism. A Trump Organization staff writer accepted responsibility for the similarities.

"One can completely understand why people plagiarize Michelle Obama," actress Mia Farrow said in a Twitter post after the first lady's speech.