Inside President Obama's Final White House Concert

Rap and hip hop was finally welcomed.

— -- Guests at President Obama's final concert at the White House had to go through three security checkpoints before placing their cellphones in brown paper bags that would be returned to them at the end of the night.

No one questioned the low-tech security precaution that removed their ability to post on Twitter, Facebook or SnapChat about the concert.

Rather the guests, some dressed in floor-length formal gowns and others in their cocktail best, moved onto green and orange trolleys that headed slowly for the South Lawn.

A white billowing tent, decorated with chandeliers and colorful uplighting, had been constructed for the evening's concert, which will be broadcast on BET on Nov. 15.

Times change.

"Say it loud," Usher instructed.

"I'm black and I'm proud," the guests responded, without prompting.

"Say it loud!"

"I'm black and I'm proud."

"Dave, you have your own block party!" the president said. "This is my block party."