I want to do biking/cycling but don’t want to loose my butt. Help?

So one of my best features is my large butt. However I would like to get in shape and get healthy. Also reducing my cellulite would be great. Since my butt is almost entirely fat I’m concerned that exercising will make me loose my butt and I’m not about to give it up. I dont like exercising to begin with so I though biking/cycling would be the easiest way for me to stay healthy without putting too much effort into it. Will biking make me loose my butt? Or keep it as is minus cellulite?