Many weeks late, a chant from the Mass for Easter. The "alleluia" (that can be) sung before the reading of the Gospel: Alleluia Pascha Nostrum.
"Alleluia. Christ our Paschal victim is sacrificed. Alleluia"
More on the celebration of Easter from ChurchYear.Net:
All about the Easter Triduum.
All about the Easter Season.
Another version of the chant above, this time accompanied by the Indian sitar. Very beautiful.