It's Stephanie's half-birthday and to celebrate, the town holds a dance party. However, Sportacus doesn't know how to dance! Robbie Rottendisguises himself as a dance instructor and teaches Sportacus how to dance, but he teaches Sportacus silly dance moves so that he will make a fool of himself at the dance party.
The Lazy Dance takes place on Stephanie's half-birthday, and when asked how she wants to celebrate, she says that she wants to have a dance party. So everyone gets together in town square and starts to practice their dance moves, when Sportacus shows up. He gets invited to Stephanie's half-birthday party, but when she tells him that it's a dance party, he gets really nervous because he doesn't know how to dance. He tells the kids this, but they don't believe him because he's a superhero, and there's nothing that a superhero can't do. When the kids leave, he does a little out loud exposition to himself that Robbie overhears. Then Robbie dresses up as a dance instructor who offers to teach Sportacus how to dance. But he teaches him these really, really awful dance moves so that he looks stupid at the party so everyone will lose respect for him. The song is We're Dancing. When Sportacus gets to the party, he performs the dumb dance moves, but the kids teach him some their own dance moves so that he doesn't look like a complete fool, and their innocence once again trumps Robbie's evil plans.