Yo rapping advertisement
This idea has been inspired by the Eminem discussion on on these boards. In my home country there's a juice company called "Yo." Yo man! Why not have them funky rappers make advertising for Yo! They wouldn't even have to change the wording - just have 'em rap along and insert a "Yo" logo. If Eminem is too expensive, I'm sure some cheap native rapper can do the trick.
Reward: Free fruit juice, yo!