That's most likely not Michael Jackson, unless you can prove it (I can't find a song of his that maybe was sampled with those lyrics). It's most likely Sweet Jodi or Terry T (probably Sweet Jodi) who sings that part. HOWEVER, and I don't know how I've missed this before, but Michael Jackson has a song called "2 Bad" and even though it's a bit different he sings the lyrics:
"2 bad, 2 bad about it
why don't you scream and shout it"
Here's the video for it (check out the Bi-O-esque dancing too, even more so than Thriller)
(if you're extremely impatient the part starts at about 1:58)