Sofia pretends to date Cooper in order to keep Gabi and Cooper's romance a secret, but complications arise when Sofia and Caroline bond as friends. Elsewhere, Elliot and Yolanda start a juice fast.
Chipmunk brothers Alvin, Simon and Theodore, with lovely (though high-pitched) singing voices, become pop sensations.
The Chipmunks enter a battle-of-the-bands competition in order to save their school's music program and face off against a group of female singing rodents known as the Chippettes.
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