FYI, this is incorrect. Not sure why it's on Linkinpedia. "Forgotten" does not use any samples from "Change the Beat (Female Version)," and that WhoSampled entry is incorrect.
Both TGSB (which has the actual "woo-hah" sample) and the leaked multitracks of the song clearly show these are not at all related. You can also clearly hear a lack of vocoder on the "Forgotten" sample (the end of CTB is vocoded). If that sample is related to anything, it's "Woo-Hah! Got You All in Check" by Busta Rhymes or the song that inspired that song, "8th Wonder" by the Sugarhill Gang. Could be a nod to one or both of those tracks, as I've played with the vocal samples from those songs on battle break records and the a cappella versions, and it doesn't sound like a direct sample.
For demonstrative purposes, here are some five-minute takes I did with both samples, scratching to show the difference: https://vocaroo.com/1obwspP6Lyx5