Borderlands and Dance Central have teamed up for a very cool free update.
You can play as Borderlands' Nisha or Claptrap in Dance Central Spotlight thanks to a recent update.
Interestingly, Harmonix and Gearbox snuck this update in very quietly - it's even a secret feature. In a very old-school move, you need to enter a smple code in a menu to activate the characters.
— Dance Central (@Dance_Central) March 8, 2015
The update is a nice promotion for the upcoming Borderlands: The Pre-Sequel DLC, which takes place in Claptrap's mind. And it's very on brand - Claptrap loves to dance.