Reading the box there was a small blurb on the back that said the following:
Gameplay requires use of a Logitech or Xbox 360 wireless microphone.
There were also several areas on the box that said a microphone was included. So, trusting what it is telling me, I picked it up. Yep, you guessed it. The microphone was wired. Maybe the reason it was on the clearance table is that noone could play it since a wireless mic is required but it doesn't come with one.
NOTE: I didn't have a camera with me so I couldn't take a picture of the box. You'll just have to trust me.