what to eat to get a bigger butt? should i change my diet?

I've been working out for a few months trying to get a bigger butt, i've had noticeable results but i was wondering should i change my diet? I dont want a hard booty, i honestly just want it to be bigger, i like the jiggle that it has. so can i keep eating junk food and fast food and not have to worry about it slowing down the process or should i really just start eating healthy? i work with weights and without them as well depending where i am. also, if you could recommend what i should eat i would really appreciate it.