Locate a casting call for Yo Gabba Gabba either online or by signing up with a casting agency. Visit websites that feature lists of free casting calls, as well as the official Nickelodeon website to make sure the show is currently casting. Read the information contained in the casting call's description, and follow the directions to audition. This may entail sending a resume or video of your dance moves to the mailing address listed in the casting call.
Audition for Yo Gabba Gabba if the casting agents select you to try out for the show. Go to Nickelodeon Studios, the site of the audition, and follow the two sets of instructions given to you by the director. Hold a number sign and say your name and age. Then say your name again and add, "I like to dance." Stand on the orange "X" taped to the floor, and dance until the director tells you to stop. Leave the audition when the director thanks you for coming.
Wait for a second audition callback and stay accessible by telephone. Go to the second audition, if a casting agent calls you back, and follow the directions given to you by the director. Say your name for the second time, and dance on the orange "X" when instructed to do so. Stop when the director tells you to.
Wait for a casting agent to call you back and inform you whether the director has selected you to appear as a dancer on Yo Gabba Gabba. If so, go back to Nickelodeon Studios for the show's taping and follow the director's instructions again. When you are finished dancing, ask someone on the set when the show will air, so you can watch the episode where you appear as a dancer.