Kristen Bell

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Idina Menzel, left, and Kristen Bell arrive at the Oscars on Sunday, March 2, 2014, at the Dolby Theatre in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

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Kristen Bell arrives at the Oscars on Sunday, March 2, 2014, at the Dolby Theatre in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

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Kristen Bell arrives at the Oscars on Sunday, March 2, 2014, at the Dolby Theatre in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

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Actress and evening co-host Kristen Bell poses before the Academy of Motion Picture Arts and Sciences' annual Scientific and Technical Awards on Saturday, Feb. 15, 2014, in Beverly Hills, Calif. (Photo by Chris Pizzello/Invision/AP)

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Actress and evening co-host Kristen Bell is interviewed before the Academy of Motion Picture Arts and Sciences' annual Scientific and Technical Awards on Saturday, Feb. 15, 2014, in Beverly Hills, Calif. (Photo by Chris Pizzello/Invision/AP)

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Evening co-hosts Kristen Bell, left, and Michael B. Jordan pose together before the Academy of Motion Picture Arts and Sciences' annual Scientific and Technical Awards on Saturday, Feb. 15, 2014, in Beverly Hills, Calif. (Photo by Chris Pizzello/Invision/AP)

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This image released by Disney shows Kristoff, voiced by Jonathan Groff, left, and Anna, voiced by Kristen Bell, in a scene from the animated feature film, "Frozen." (AP Photo/Disney)