Barack Obama surprise guest at Michelle Obama's book show

WASHINGTON (AP) -- Former President Barack Obama practically brought the house down at Michelle Obama's book show in Washington.

The former first lady is currently touring the country promoting her memoir, "Becoming," and participated in a conversation Saturday night moderated by her longtime friend and former Obama White House adviser Valerie Jarrett.

Barack comes out on stage and stands next to Michelle and says “This must be what it’s like to be Jay-Z.” -- pic.twitter.com/EOpT95cwos

— Aditi (@AditiGetsTweety) November 18, 2018

When the conversation shifted toward Mrs. Obama's feelings about her husband, Jarrett announced a "special guest" and Barack Obama came on stage carrying a bouquet of pink roses for his wife.

The crowd at Capital One Arena leapt to its feet.

"This is like - you know when Jay-Z comes out during the Beyonce concert? ... Like, 'Crazy in Love?'" the former president said, according to CNN. The rapper is known for appearing at his wife's concerts during her hit song "Crazy in Love."

So tonight I had the opportunity to see Michelle Obama talk about her life and discuss her new book!! Then at the very end, Barack came out and told us what it was like falling in love with Michelle.

When I tell y’all my heart is FULL!!! ---- pic.twitter.com/p7q99uRw1v

— Pepper Dem Gang (@turquoiselovex6) November 18, 2018

Jarrett asked him what about Michelle Obama captured his heart when they met at a Chicago law firm where she was his mentor.

Barack Obama said she was "one of a kind," strong and honest, and someone he knew he could always count on.

He also said he knew that if she was the mother of his children their offspring would be "extraordinary."