Let It Be by Dyme Def is available on iTunes so it must be cleared, right? Thanks to Fun Bongo for telling me about this track.
Stay With Me by Ironik has not one but two sped up choruses. It's big on the Fizz TV channel.
All this sped up vocal business reminds me of Mark Oh's classic interpretation of Lionel Richie's Stuck On You. That vocal drop out crowd noise trick is so good!
Dyme Def - Let It Be (iTunes)
DJ Ironik - Stay With Me (iTunes link that will probably be removed soon)
Mark Oh - Stuck On You (there's only a terrible soundalike on iTunes)