These remixes are sounding pretty hot. These are official, so will probably be available to buy on itunes quite soon. As for chart predictions, I can't see it doing as well as Circus (#3 peak) or Womanizer (#1 peak), but I can certainly see it reaching the top 20.
1) If You Seek Amy (Gthardstyle Remix)
2) If You Seek Amy (Tony Arzadon Remix)
3) If You Seek Amy (Booth Pimps Remix)
Download / If You Seek Amy Remixes