Shira is the secondary antagonist turned ally in Ice Age: Continental Drift and later appearing as a minor character in Ice Age: Collision Course. She is a former pirate smilodon who becomes Diego's wife in Ice Age: Continental Drift.
Does Jessie J sing in Ice Age?
My Superstar is a song preformed by Brooke, a Geotopian ground sloth, (voiced by Jessie J) in Ice Age: Collision Course. Jessie J's inspiration for the song was that everyone has someone in their life that they think is their superstar.