Should WWE SvR 2011 make the Xbox 360 slim overheat?

Hey, i live in Australia and I got WWE SmackDown vs Raw 2011 the other day, but after about 10-20 minutes of gameplay (as soon as the game starts) the side of my Xbox 360 slim heats to about 25 degrees celcius. It's really starting to bug me so if anybody has had the same problem or might have an idea, i would REALLY appreciate it!!! :D