EXCLUSIVE: Mama June's weight loss surgeries revealed -- how she went from 460 pounds to a size 4


Mama June's much hyped stunning physical transformation is the result of not only multiple surgeries, but of plenty of hard work and an entire mental overhaul, her daughters, Alana and Lauryn Thompson, tell ET exclusively.

ET sat down with 11-year-old "Honey Boo Boo," 17-year-old "Pumpkin" -- as they're known to Here Comes Honey Boo Boo fans -- as well as Mama June's show trainer, Kenya Crooks, on Wednesday, when they dished about her dramatic weight loss. Mama June's journey is being chronicled on her new WE tv docu-dramedy, Mama June: From Not to Hot, which debuts on Friday.

"She had gastric sleeve back in May of 2015, and then she slowly started losing weight, and the reason she got the gastric sleeve was because she hit a plateau -- she couldn't lose any weight," Pumpkin tells ET's Jennifer Peros, referring to the procedure that makes a patient's stomach smaller. "And then it came to a point where [the trainer] had to step in because she hit another plateau with the gastric sleeve, and wasn't losing any more weight."

See photos of Mama June:

38 PHOTOS
Mama June through the years
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Mama June through the years
ATLANTA, GA - MAY 23: TV personality Mama June attends the 'Growing Up Hip Hop Atlanta' premiere at Woodruff Arts Center on May 23, 2017 in Atlanta, Georgia. (Photo by Marcus Ingram/WireImage)
ATLANTA, GA - MAY 23: TV personalities Honey Boo Boo and Mama June attend the 'Growing Up Hip Hop Atlanta' premiere at Woodruff Arts Center on May 23, 2017 in Atlanta, Georgia. (Photo by Marcus Ingram/WireImage)
NEW YORK, NY - APRIL 06: Mama June appears on The Jenny McCarthy Show at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June visits at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June (L) and Jenny McCarthy appear at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 05: (L-R) Mama June, AJ Calloway, and Honey Boo Boo pose on the set of 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June (L) and daughter Honey Boo Boo visit 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
LOS ANGELES, CA - JANUARY 18: Honey Boo Boo and her mom Mama June along with sister Pumpkin in Beverly Hills, Ca on January 18, 2016 in Los Angeles, California. (Photo by Light Brigade/Bauer-Griffin/GC Images)
LOS ANGELES, CA - OCTOBER 15: June Shannon and Alana 'Honey Boo Boo' Thompson are sighted at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/FilmMagic)
NEW YORK, NY - JULY 15: June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Rob Kim/Getty Images)
MCLEAN, VA- July 11: Mike 'Sugar Bear' Thompson attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson (L) and June Shannon visit 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
ATLANTA, GA - JANUARY 05: Alana 'Honey Boo Boo' Thompson and Mama June Shannon attend the ATL Premiere Of WE Tv's 'Growing Up Hip Hop' at SCADshow on January 5, 2016 in Atlanta, Georgia. (Photo by Prince Williams/WireImage)
HOLLYWOOD, CA - NOVEMBER 19: (L-R) TV personalities Lauryn 'Pumpkin' Thompson, Mike 'Sugar Bear' Thompson, Alana 'Honey Boo Boo' Thompson and June 'Mama June' Shannon attend We tv's celebration of the premieres of 'Marriage Boot Camp Reality Stars' and 'Ex-isled' at Le Jardin on November 19, 2015 in Hollywood, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (R) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson visits 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
NEW YORK, NY - APRIL 04: Alana Thompson aka. Honey Boo Boo and June Shannon aka. Mama June seen out in Manhattan on April 04, 2013 in New York City. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (L) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson (L) and June Shannon visit 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
Mama June and Sugar Bear
Mama June and Sugar Bear
UNIVERSAL CITY, CA - SEPTEMBER 09: June Shannon visits 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
Honey Boo Boo and family dressed as the Kardashians.
LOS ANGELES, CA - NOVEMBER 18: Mama June and Honey Boo Boo are seen at LAX on November 18, 2015 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
Honey Boo Boo and family
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0073 -- Pictured: (l-r) Television personalities Mama June and Honey Boo Boo during an interview with host Jimmy Fallon on June 11, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0073 -- Pictured: (l-r) Television personality Honey Boo Boo during an interview with host Jimmy Fallon on June 11, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
GOOD MORNING AMERICA - Honey Boo Boo and Mama June (Here Comes Honey Boo Boo) are guests on 'Good Morning America,' 2/5/14, airing on the ABC Television Network. (Photo by Fred Lee/ABC via Getty Images) AMY ROBACH, MAMA JUNE, HONEY BOO BOO
NEW YORK, NY - JULY 15: Honey Boo Boo's mother June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Charles Norfleet/FilmMagic)
MCLEAN, VA- July 11: June 'Mama' Shannon attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
MCLEAN, VA- July 11: Alana 'Honey Boo Boo' Thompson attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
JIMMY KIMMEL LIVE - 'Jimmy Kimmel Live' airs every weeknight, (12:00 - 1:06 a.m., ET), following 'Nightline,' packed with hilarious comedy bits and features a diverse lineup of guests including celebrities, athletes, musicians, comedians and humorous human interest subjects. The guests for MONDAY, OCTOBER 15 included actor Aziz Ansari ('Parks and Recreation'), Alana 'Honey Boo Boo' Thompson and June 'Mama' Shannon ('Here Comes Honey Boo Boo') and musical guest Josh Turner. (Photo by Richard Cartwright/ABC via Getty Images) JUNE 'MAMA' SHANNON, ALANA 'HONEY BOO BOO' THOMPSON, JIMMY KIMMEL
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (L) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
Honey Boo Boo színre lép (3. évad)
MCLEAN, VA- July 11: June 'Mama' Shannon, Mike 'Sugar Bear' Thompson, Alana 'Honey Boo Boo' Thompson, Anna 'Chickadee' Shannon and Lauryn 'Pumpkin' Shannon attend the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
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WATCH: Mama June Drops Down to a Size 4 After Weighing 352 Pounds, Her New Show Teases

Mama June, 37, also got surgery to remove excess skin after dramatically dropping pounds.

"Her stomach started looking gross," Pumpkin candidly says. "It was hanging from where she lost so much weight, and her arms and her chin, so she got [the skin on] her stomach removed."

The mother of four later got surgery on her breasts.

"She got her boobies done," Pumpkin reveals. "She got them from a 44 long to 36 up."

Mama June started her weight loss journey at 460 pounds, and a teaser for her new reality show suggests that she's now down to a size 4. However, Pumpkin says her mom still struggles with seeing herself as a much heavier person.

"I think that her biggest thing [she has to] overcome is that fact that she still thinks of herself as a bigger person, because, even to this day, like, a couple of days ago we had a conversation, and ... she looked in the mirror and was like, 'I'm still fat,'" Pumpkin shares. "And I guess because she's seen herself as a bigger person all these years, she doesn't realize how small she is."

"That's what she's used to doing, and when you're a bigger person, that's how you disguise all of that -- through wearing bigger clothes," Crooks weighs in. "So, now, we're having to transform her mind even more so ... because she has curves now, she looks awesome."

Another huge challenge? Getting Mama June to stay in hiding until the show is ready for her big reveal.

"It is very hard because mama, she is a very stubborn person, and she wants to do everything," Pumpkin explains. "She's like, 'Alright, I've got to go to the store,' and we're like, 'Mama, no, you need to stay in the house because if somebody gets a picture with you...'"

See photos of Mama June and Pumpkin:
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14 PHOTOS
Mama June and Pumpkin, "Here comes Honey Boo Boo"
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Mama June and Pumpkin, "Here comes Honey Boo Boo"
(photo credit: Inside Edition)
(photo credit: Inside Edition)
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I don't know but I think I maybe Fallin' for you dropping so quickly Maybe I should keep this to myself Waiting 'til I know you better I am trying not to tell you But I want to I'm scared of what you'll say So I'm hiding what I'm feeling But I'm tired of holding this inside my head
Come hangout with us in Albany the whole honey boo boo clan is here. The Albany Exchange Fair Grounds: Wing Feast.
GOOD MORNING AMERICA - Honey Boo Boo and Mama June (Here Comes Honey Boo Boo) are guests on 'Good Morning America,' 2/5/14, airing on the ABC Television Network. (Photo by Fred Lee/ABC via Getty Images) 
June Shannon appears at a "How To Honey Boo Boo: The Complete Guide" book event, held at Barnes & Noble Citigroup Center, New York
June Shannon attending the 24th GLAAD Media Awards at the Marriott Marquis Hotel in New York.
NEW YORK, NY - JULY 15: Honey Boo Boo's mother June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Charles Norfleet/FilmMagic)
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"Even if she does go out, she has to be, like, suited up," she adds about her mother's disguise.

Most important, Mama June's daughters says she is much happier after her significant weight loss, and feeling much more confident.

"I kind of didn't want her to do it before, but after she did it, I'm very happy," Honey Boo Boo acknowledges, referring to the risks of weight loss surgery.

"I'm not trying to be all R-rated or whatever, but, she'll walk around the house in a pair of underwear!" Pumpkin later jokes about her mom's self-confidence these days. "I'm like, 'June, put your pants on, put your pants on!'"

WATCH: Mama June Documents Extensive Plastic Surgery, Body Transformation in New Show 'From Not to Hot'

The network has called Mama June's weight loss "the most shocking transformation in reality TV history."

"I'm changing my body and my love life," Mama June says with determination in one teaser. "I'm about to start the biggest transformation of my life. This surgery is the scariest thing I've ever done, but there is a skinnier person inside of me."

Mama June: From Not to Hot debuts Friday, Feb. 24 at 10 p.m. ET/PT on WE tv.

Watch the video below for more on Mama June's epic body transformation.

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