Kate challenges shy Allison to enter a dance contest with her, but when Kate sprains an ankle, Allison must go it alone in the finals.

Miffed at Kate for signing them up for a twin-testing project, Allison moves in with Beth, vowing to find her own identity---and to celebrate her birthday without her sister.

Art panics after reading Allison's diary, which reveals that she's driven by passion in her relationship with heartthrob Steven.