Lawmakers jammed with the country group Lady Antebellum at the annual GRAMMYs on the Hill event Wednesday night. 

Minority Whip Steny HoyerSteny Hamilton HoyerHoyer heads to the heartland on a ‘listening tour’ Conservatives fear end-of-year ‘Christmas tree’ spending bill Dem leaders increasingly bullish about retaking House MORE (D-Md.) was the first member onstage, but he was soon joined by Majority Whip Kevin McCarthyKevin Owen McCarthyPelosi blasts California Republicans for supporting tax bill Lawmakers, celebs honor Tony Bennett with Library of Congress Gershwin Prize Pete King rips White House budget chief for trying to ‘screw’ NY MORE (R-Calif.) and Minority Leader Nancy PelosiNancy Patricia D'Alesandro PelosiDems to FCC: Force Sinclair to sell stations for merger approval Pelosi blasts California Republicans for supporting tax bill Juan Williams: The politics of impeachment MORE (D-Calif.).

Pelosi even came prepared with a maraca.

McCarthy, who co-chairs the Recording Arts and Sciences Congressional Caucus with Hoyer, was honored along with Pelosi for their advocacy of the music industry.

“There’s one core value in this country, and that’s fairness,” McCarthy said after receiving his award.

That statement was echoed in Rep. Doug Collins's (R-Ga.) performance later in the evening. He accompanied songwriters Gary Burr and Victoria Shaw in a live performance of “Fair,” a song about copyright parity that the trio wrote together.

“I don’t want more than my share, I just want what’s fair,” Burr and Shaw sang. Collins, who has sponsored the Songwriter Equity Act, provided backup vocals and percussion.

The message of fairness will be conveyed by hundreds of musical professionals from across the United States, as they head to Capitol Hill Thursday for The Recording Academy’s annual advocacy day.

“Harmony, unity, and parity,” which comprised the motto of the event, were three principles highlighted in The Recording Academy CEO Neil Portnow’s remarks. He announced a “MusicBus proposal."

“For all the complexities of the MusicBus concept, its goal is actually so simple it could fit on a bumper sticker: ‘Fair market pay to all music creators across all platforms,’ ” he said to applause.

Also in attendance were Rep. Judy Chu (D-Calif.), among other members of Congress; Dionne Warwick; Joy Williams of musical group The Civil Wars; Hanson; Wesley Schultz of The Lumineers; and musical group Los Lonely Boys.