How about Easter Parade?
Frank Zappa - Watermelon in Easter Hay
Realistically, there's not really many songs, other than religious, that are dedicated to Easter. I assume, however, the reason you were hired in the first place was for the music you regularly perform, and that, other than the few songs posted above, would be what I would go with.
Good Luck,
Gary

_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)