If you want to gain muscle, you will have to eat more which will add on some pounds. You really cant gain much muscle without some fat. In the end though the extra muscle will help you loose those few pounds. Its worth it!
The important thing is to eat clean real foods.
Diet is everything!!! Get in good low gi carbs, and protien in every meal. Dont forget moderate good fats. Try not to mix carbs and fats.
Good luck!!