iTunes music this morning released Heart's version of Stairway to Heaven as performed by the band, with Jason Bonham and backed up by 2 choirs, on Dec 3rd at the Kennedy Center Honors Gala. It was broadcast on boxing day, Dec 26th.
You can get the file for 99-cents on iTunes.
It appears at this time that no other songs from that night have been released.
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In 2004, Heart re-released their 1977 album, Little Queen on CD. The release had, as a bonus track, a live version of the iconic Led Zeppelin song, recorded in 1976.
Here's heart at the Kenendy Center Honors, performing Stairway to Heaven