Yo-Yo Ma & Itzhak Perlman perform at the Obama inauguration.

Chicago-born Anthony McGill, principal clarinetist in the Metropolitan Opera orchestra, and Venezuelan pianist Gabriela Montero complete the classical quarter. John Williams conducted his new piece, Air and Simple Gifts, which weaves the Simple Gifts melody from Aaron Copland's 1944 ballet Appalachian Spring.

Updated 1/23/09: The New York Times reports the performance was recorded two days before: Frigid Fingers Were Live but the Music Wasn't.