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Credit: Brian To/WENN.com

Thin is certainly still in, but do you know exactly how small Hollywood couture is? We were shocked to find out the numbers on these celebrity dress sizes — mostly because we don’t know many women who go around telling the world what’s on their clothing tag. But then again when you’re a size 2 or 4 we guess you feel like you want to shout if from the rooftops, or the magazine pages.

Beyonce

Post-baby Beyonce is super thin and a 2 or 4 depending on the designer. That vegan diet is really paying off for the formerly “bootylicious” singer, though she’s still got a pretty ample backside. Looks like she trimmed down in all of the right places.

https://www.instagram.com/p/BKhLZf5DdWd/

Amber Rose

Amber was a size 6 when she auctioned off some of her pieces on E-Bay’s Fashion Vault in 2012. But post-baby, some say she’s gained a little weight to which she Tweeted, “I’m 5’9 148. How am I fat?”

Rihanna

Rihanna is a size zero. But the 5’8″ star says she’s not happy about it. She told Us Weekly, “I prefer myself a bit chunkier. I want my old butt back!”

Mariah Carey

Mariah told US Weekly that she’s keeping it down to a size six post Moroccan and Monroe.

Tyra Banks

Tyra Banks says her weight fluctuates between 148 and 162 now that her modeling days are over. But she says that even when she was a size 4 in her hey day, she would “overhear people say ‘she’s fat’ in different languages” when her waist fit small garments but her butt did not.

Credit: Brian To/WENN.com

Scarlett Johansson

Scarlett’s hourglass frame makes it easy to over-estimate her size, but she’s only a 2!

https://www.instagram.com/p/l8KGyLyamZ/

America Ferrera

The Ugly Betty star is no stranger to weight criticism. But she recently revealed that even though she’s a 6/8 she still feels insecure about her weight.

https://www.instagram.com/p/BLGM8e_DGS5/

Mindy Kaling

5’4″ star of the Mindy Project Mindy Kaling revealed her size in her book Is Everyone Hanging Out Without Me?: “For the record, I’m a size 8 (this week anyway). Many stylists hate that size because, I think, to them, I lack the self-discipline to be an aesthetic, or the sassy confidence to be a total fatty hedonist. They’re like ‘Pick a lane.'”

https://www.instagram.com/p/BDMqlgNmuDr/

Jennifer Lopez

Jennifer Lopez says she’s usually a six but you can catch her in an eight or a four depending on how good or bad a month she’s had!

Jessica Alba

Two beautiful girls later and Jessica Alba still fits into size 2/4 jeans.

Credit: PNP/WENN.com

Christina Hendricks

Christina Hendricks says she found it almost impossible to find size 14 gowns to wear to award ceremonies: “They only lend out a size 0 or 2. So I’m still struggling for someone to give me a darn dress.”

Jennifer Hudson

J-Hud slimmed down from a size 16 to a size 6 with a little help from Weight Watchers.

Khloe Kardashian

Super-tall Khloe Kardashian says she’s a size 6/8.

Jenna Fischer

The Office‘s Jenna Fischer told Redbook that going from a size 4 to a size 6 can be tough in Hollywood: “It’s really embarrassing to have to say to your manager, ‘I’m now a 6 pant instead of a 4.’ Emails go out, and they CC the agents: ‘Jenna would like everyone to know that she’s now a 6 pant.'”