TV's former Catwoman voices Cool Cat (inset).

When Nickelodeon's Emmy-winning The Wonder Pets! series kicks off its third season on May 18, Eartha Kitt will be among the guest stars, voicing a Cool Cat who wants to scat. Kitt's voice work for the animated series marks one of her final performances before succumbing to colon cancer last Christmas Day.

Playing Hip Hippo to Kitt's Cool Cat in the season opener is acclaimed jazz singer Jon Hendricks. Kitt, of course, was one of the actress to play Catwoman to TV's Batman.

Other guest performers on tap for Season 3 of The Wonder Pets! are Lauren Bacall and Ben Vereen.

The Wonder Pets! chronicles the adventures of three singing classroom pets who travel the world to save animals in distress.