Addison is borderline addicted to a show called Yo Gabba Gabba. The show is quite obnoxious in my opinion, but she LOVES it and that's the important part. Once of the show segments is called Biz's beats and it is presented by a very well known rapper called Biz Markie (from such songs as You Say He's Just a Friend). In his segment Biz teaches the basics of rapping, or as my sweet sister-in-law calls it, Boo-Hiccups (that's what it sounds like when she tries). Addison is really taking to this rap education and I couldn't resist capturing it on video to share with the masses.
Just FYI- the man's voice you're hearing is Biz's, not Greg's.