Green Is Universal, but when it comes to 'Chuck' stars Zachary Levi and Josh Gomez, green sometimes means dressing in drag.

We've got an exclusive behind-the-scenes look at NBC's latest eco-friendly campaign and their Green Week "The More You Know" spots, featuring some singing and cross-dressing hilarity with Levi, Gomez and some interesting new uses for shag carpeting courtesy of 'Community' funnyman Ken Jeong.

Bonus: Leave your best tip for living green in the comments for a chance to win a $100 NBCUniversal gift card courtesy of NBC's Green Is Universal campaign. Details and the full video after the jump!