Top 40/Electro Transition into Dubstep songs

[Topps]

Hey does anyone have any songs that go from like Top 40 or electro into Dubstep? Like a transition mix. Similar to this :

http://soundcloud.com/djphase/phasejumptodubbreak

I have lots of ways of doing it myself but it would obviously sound really clean if it was already into the song and I can really keep the energy alive.

Thank you!

[seitz]

zedd remix of black eyed peas...forget the song but its not hard to find