All Grown Up! S03E05 - It's Karma, Dude!

When theres a talent show on and they've got places for singing, Angelica signs up, but Tommy tells Angelica to let Susie know. When Angelica calls, its on the answering machine, but it breaks. Angelica then pretends she's reminding her in front of Tommy, which when Susie comes back to school, eventually believes in Angelica.