Singer Alesha Dixon will perform with The Corps of Drums of the 1st Battalion Coldstream Guards and 1st Battalion Irish Guards, while singer Pixie Lott will appear alongside trumpeters from the Band of the Grenadier Guards.
Deschanel, who plays keyboards and sometimes drums in the band, joins Fresh Air to discuss her no-longer-secret life as a singer and songwriter, and the new album from She and Him, titled Volume One.