Obama was speaking before a sold out crowd in Brooklyn, New York, at Barclays Center.
Then, in what may be an unprecedented slip-up, Obama said the line that threw the audience and internet into a frenzy.
Former MSNBC host Toure, who was at the speech, called it a "cute moment" and mocked those who criticized the first lady over it. As outspoken as she has always been, she seems to have loosened up a lot more since leaving the White House.
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What's next: Nasrallah is expected to give a speech in Lebanon this evening in response to the Israeli operation. The military has used various means to collapse or fill in tunnels from the Gaza Strip.
Author and political commentator Toure Neblett tweeted that "everyone freaked out ..."
"I want our men to understand that about what role they are playing to make us feel safe or unsafe".
On what's next after the book tour: "I'm really excited to hear what people are getting from the book.
I grew up in a neighbor where because of fear - fear of going outside, being stopped by police, fear of leaving what you knew - kept people stuck in one place", she recalled.
In a study this year, a group of Duke University psychology professors used 2,000 participants to test the lean-in approach and how it worked with structural and systemic disadvantages women face in the workplace. They had to work, but that doesn't mean they weren't highly intelligent.
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I've spent time up there (Capitol Hill) talking about the USMCA and the importance of it. The United States should protect its sovereignty over the interests of other countries.
Since its debut, the "lean in" philosophy has been met with mixed success.
One group of women read excerpts from "Lean In" and listened to portions of Sandberg's TED talks that focused on how women should be more confident in the office. "Try something else, you're good at so many things'". "Sometimes that stuff doesn't work".
Asked what impact her first visit to EGA had on her, Mrs Obama said: "On a personal level I was just moved touched and inspired, as I always am by the young people I meet around the world".
While the Obamas have a seemingly flawless marriage, the forever FLOTUS admitted it takes hard work to keep it going.
More recently, "leaning in" and Sandberg's leadership were placed under additional scrutiny after controversy erupted around Facebook and Russian interference in the 2016 election.
While Obama has not criticized Trump directly at events to promote her memoir, she does criticize him in the book.
New Zealand 21-5 USA: All Blacks Sevens win Dubai tournament
England finished top of Pool B with three wins, impressively beating the Olympic champions Australia 26-12 in their first match. The New Zealand men's and women's teams have also won Commonwealth Games gold and World Cup gold this year.
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