AceShowbiz - SZA has "always wanted a really fat ass." The 33-year-old music star has opened up about her decision to get a so-called Brazilian butt lift, which is a cosmetic procedure that involves a fat transfer to the buttocks, and SZA insists that she doesn't have any regrets about her decision.

She explained to ELLE magazine, "I treat my butt like a purse. It's just there to enhance whatever else. And that's why I paid for it, because it works all by itself."

SZA has wanted a bigger backside for years, and she insists she didn't take the decision because of outside pressure. The "I Hate U" hitmaker, whose real name is Solana Rowe, said, "I always wanted a really fat ass with less gym time. I didn't succumb to industry pressure. I succumbed to my own eyes in the mirror and being like, 'No, I need some more ass.' "

SZA has enjoyed huge success in recent years, and the singer admits that she's always been motivated by her critics. She shared, "I have a deep desire to shut everyone up. And that probably comes from high school and all that type of s**t. My mom always told me that I’ve always been the kind of person where people either really f**k with me or they just don’t like me at all."

SZA always strives for perfection and the music star confessed that she's never satisfied with her own efforts. She said, "I'm never happy with anything because I'm just like, 'This was not good enough.' I don't know why I'm like that. I feel like some of it is probably a mental issue, some disorder that needs to be treated."