Butt Implants/BBL At the Same Time Possible For Small Frame?

I was thinking about getting the BBL with butt implants, by adding butt implants does that mean less fat can be injected? But when i look at celebrities like Nicki minal, Angel lola luv, and Blacc Chyna ALL of those women BEFORE PICTURES they were SMALL FRAMED (Smaller then me), now they have these GIANT BOOTIES/HIPS, which tells me that they didnt use ALL fat. I want to avoid getting more then one procedure done. What do you think?