Sir Mix-a-Lot has Blake Lively's back!

The "Baby Got Back" rapper is defending Lively's controversial Instagram post from Cannes, in which she posted a side-by-side image of her front and backside in a curve-hugging gown. The caption, a reference to Sir Mix-a-Lot's 1992 hit: "L.A. face with an Oakland booty."

WATCH: Baby Got... Backlash? Blake Lively Slammed for Quoting Sir Mix-a-Lot 

"I liked it," Sir Mix-a-Lot writes in an op-ed published byThe Hollywood Reporter. "I like stuff like that." 

The 52-year-old admits he was "surprised at the criticism" Lively received from the post, especially considering previously well-received references to the same line used by Katy Perry (in 2012) and Khloe Kardashian (in 2015).

"I wrote this song not as a battle between the races. I wrote the song because I wanted Cosmopolitan, I wanted all these big magazines to kind of open up a little bit and say, 'Wait a minute, this may not be the only beautiful,'" he writes, pointing to an unrealistic "waif-thin, borderline heroin addicts" standard of beauty in the '90s. (He's also quick to point out that his drug reference isn't meant to be taken literally. "I mean the look," he clarifies.)

"What I meant by 'L.A.' was Hollywood. In other words, makeup or whatever it took to make that face look good, they do it in L.A. But, as much as you can throw makeup on something, you can't make up the butt," he continues. "That's what L.A. face and Oakland booty meant. You can put makeup on that face and make it look beautiful, but a butt is a butt, a body is a body."

WATCH: Blake Lively Finally Shows Off Her Baby Bump at Cannes 

It's safe to say that Sir Mix-a-Lot is definitely pleased by Lively's hat tip.

"Doesn't that mean that the norm has changed, that the beautiful people have accepted our idea of beautiful? That's the way I took it," he ponders. "If what Blake Lively meant by that comment was, 'Oh my goodness, I've gained weight, I look horrible,' if that's what she meant — and I doubt that she did — then I'm with the critics. But no one in the world is gonna tell me that a woman that wears that dress is thinking that she's fat. No, I'm sorry, it just doesn't happen. It sounds like to me like she was giving the line props."

He also cautions fellow African-Americans against being too quick to criticize the actress.

"I think we have to be careful what we wish for as African-Americans, because if you say she doesn't have the right to say that, then how do you expect her at the same time to embrace your beauty?" he writes. "That song was written with African-American women in mind, but trust me when I tell you that there are women out there with those curves everywhere, and they were once considered fat. And that's what the song was about. It wasn't about some race battle."

The 28-year-old Cafe Society star is currently pregnant with her second child with husband Ryan Reynolds -- and with all eyes on her growing baby bump, there's still no denying Lively's flawless sense of fashion! See her most fabulous Cannes looks below.

WATCH: Blake Lively Continues to Dazzle in Chic Maternity Wear at the Cannes Film Festival