Lady Gaga, Tony Bennett perform at final inaugural ball

Pop icon Lady Gaga and singer Tony Bennett sang a duet at President Obama's final inaugural event, a ball for aides and campaign staffers.

WASHINGTON — President Barack Obama thanked White House aides and his re-election campaign staffers Tuesday night at the final celebration of his inauguration, the Staff Ball.

Pop star Lady Gaga and singer Tony Bennett provided the entertainment, as the audience posted photos online.

The Washington Post reported that Gaga sang some of her hit songs and later was joined by Bennett for a duet of the 1937 show tune classic "The Lady Is a Tramp."

Obama told the thousands of guests that they represent, in his words, his "deepest hopes for America." He said he knows the nation's future is in good hands.

First lady Michelle Obama, wearing a silver and black ensemble, echoed the president's campaign-year chant of "fired up, ready to go."

Proceeds will support a memorial fund for Alex Okrent, a campaign worker who collapsed and died at Obama's campaign headquarters in July.

The Associated Press contributed to this report.

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