Us Weekly reports that after a whirlwind Inauguration Day for the president and first lady Michelle ObamaMichelle ObamaObama talked trash, won money from 3 celebs over golf game Former Michelle Obama aide enters Maryland governor's race Will Smith: Obama said I 'have the ears' to play him in a movie MORE, the couple hosted a soiree at the White House into the wee hours of the morning.

A source tells the magazine of the celeb-filled shindig, “The party went on until 2 a.m.!”

Among the guests who reportedly mixed and mingled with the first family at the Monday night gathering were former President Clinton; former Secretaries of State Colin Powell and Madeleine Albright; Sen. John KerryJohn KerrySinclair and 'Big Media': The outrage that caused the outrage Tillerson sets a lost State Department on the right course Spy agencies changed rules, making it easier to unmask members of Congress MORE (D-Mass.); Alicia Keys and her husband, Swizz Beatz; Usher; Kelly Clarkson and her fiancé, Brandon Blackstock; Jennifer Hudson; Eva Longoria; Kerry Washington; “CBS This Morning” anchor Gayle King; Brad Paisley; Ashley Judd; Attorney General Eric HolderEric H. HolderVenture capital firm sues ex-Uber CEO for fraud Justice Dept. to meet with journalism group on subpoena guidelines Documents reveal the email alias Loretta Lynch used in office MORE; Katy Perry and rumored on-again boyfriend John Mayer; and John Legend and his fiancée Chrissy Teigen.

According to Us Weekly’s source, “They all stayed until the end ... Obama was dancing with everyone and let his guard down!"