Red Carpet Roundup: Katie Holmes is lovely in lace but Demi Lovato fails to impress in pajamas

Stars certainly lit up the red carpet this week!

From Gisele Bundchen to Katie Holmes, stars looked absolutely gorgeous at several events.

Holmes looked lovely in lace at the blue carpet premiere of Amazon Prime video original series "The Tick," while Bundchen proved she's still got it in a form-fitting LBD. Meanwhile, Mandy Moore was a total vision in a bright red maxi dress that she perfectly paired with nude pumps and sparkly silver accessories.

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Week of 8/14: Best & worst looks
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Week of 8/14: Best & worst looks

BEST: Katie Holmes showed off her toned stems in a flirty lace ensemble with ruffled detailing at the blue carpet premiere of Amazon Prime video original series "The Tick."

(Getty)

WORST: Blac Chyna turned heads for all the wrong reasons in a see-through skirt with colorful petal-like embellishments throughout.

(Getty)

BEST: Chanel Iman looked seriously sexy in a two-piece ensemble with stilettos of the same hue at the blue carpet premiere of Amazon Prime video original series "The Tick."

(Getty)

WORST: Is it time for bed? Demi Lovato failed to impress in this shapeless, emerald pantsuit with a plunging neckline.

(Getty)

BEST: Wowza! "Dancing With the Stars" pro Peta Murgatroyd put a red carpet twist to her ballroom wear in this sexy sheer maxi skirt with a patterned silk blouse.

(Getty)

WORST: Just like Demi Lovato, Heidi Klum failed to impress with her animal print pajama ensemble. 

(Getty)

BEST: Legs for days! Gisele Bundchen proved she's still one of the most gorgeous women on the planet in this revealing lace LBD that showcased her mile-long legs.

(Getty)

WORST: Woah, Mel B! The "America's Got Talent" judge ditched her undergarments in this bedazzled bodysuit that definitely has us raising our eyebrows ...

(Getty)

BEST: Mandy Moore was a total vision in a red maxi dress with slight sheer detailing. The "This Is Us" star polished off her look with nude pumps and some sparkly accessories. 

(Getty)

WORST: Christina Milian left little to the imagination in this two-piece look, but the skin-baring outfit looked out of place at the screening of Netflix's "True and the Rainbow Kingdom."

(Getty)

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However, there were some celebs who definitely should've reconsidered their outfit choices. Both Demi Lovato and Heidi Klum rocked on-trend, pajama-like ensembles, but they failed to impress in their shapeless looks.

Mel B hit the red carpet before a live taping of "America's Got Talent" in a see-through, bedazzled bodysuit that left little to the imagination. She ditched her undergarments for the occasion, making it one of the most scandalous outfits we've seen in a while!

Blac Chyna, Christina Milian and a number of other stars also made this week's roundup. Check out the slideshow above for the best and worst looks of the week.

RELATED: See what Gisele Bundchen has been up to lately:

26 PHOTOS
Gisele Bundchen out and about
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Gisele Bundchen out and about
MILAN, ITALY - SEPTEMBER 24: Gisele Bndchen attends the Green Carpet Fashion Awards Italia 2017 during Milan Fashion Week Spring/Summer 2018 on September 24, 2017 in Milan, Italy. (Photo by Venturelli/Getty Images)
MILAN, ITALY - SEPTEMBER 24: Gisele Bundchen attends the Green Carpet Fashion Awards Italia 2017 during Milan Fashion Week Spring/Summer 2018 on September 24, 2017 in Milan, Italy. (Photo by Jacopo Raule/Getty Images)
MILAN, ITALY - SEPTEMBER 24: Gisele Bundchen attends the Green Carpet Fashion Awards Italia 2017 during Milan Fashion Week Spring/Summer 2018 on September 24, 2017 in Milan, Italy. (Photo by Jacopo Raule/Getty Images)
MILAN, ITALY - SEPTEMBER 24: Gisele Bundchen attends the Green Carpet Fashion Awards Italia 2017 during Milan Fashion Week Spring/Summer 2018 on September 24, 2017 in Milan, Italy. (Photo by Jacopo Raule/Getty Images)
MILAN, ITALY - SEPTEMBER 24: Gisele Bndchen attends the Green Carpet Fashion Awards Italia 2017 during Milan Fashion Week Spring/Summer 2018 on September 24, 2017 in Milan, Italy. (Photo by Venturelli/Getty Images)
SAO PAULO, BRAZIL - AUGUST 16: Gisele Bundchen attends Rosa Cha presents Gisele Bundchen on August 16, 2017 in Sao Paulo, Brazil. (Photo by Daniel Vorley/Getty Images)
SAO PAULO, BRAZIL - AUGUST 16: Brazilian model Gisele Bundchen poses for photos during Rosa Cha's 2018 Summer Collection launch on August 16, 2017 in Sao Paulo, Brazil. (Photo by Eduardo Martins/Brazil Photo Press/LatinContent/Getty Images)
SAO PAULO, BRAZIL - AUGUST 16: Brazilian model Gisele Bundchen poses for photos during Rosa Cha's 2018 Summer Collection launch on August 16, 2017 in Sao Paulo, Brazil. (Photo by Eduardo Martins/Brazil Photo Press/LatinContent/Getty Images)
SAO PAULO, BRAZIL - AUGUST 16: Brazilian model Gisele Bundchen poses for photos during Rosa Cha's 2018 Summer Collection launch on August 16, 2017 in Sao Paulo, Brazil. (Photo by Eduardo Martins/Brazil Photo Press/LatinContent/Getty Images)
NEW YORK, NY - MAY 09: Model Gisele Bundchen speaks onstage during David Lynch Foundation Hosts �Women of Vision Awards� at 583 Park Avenue on May 9, 2017 in New York City. (Photo by Dimitrios Kambouris/Getty Images for David Lynch Foundation)
NEW YORK, NY - MAY 09: Model Gisele Bundchen speaks onstage during David Lynch Foundation Hosts �Women of Vision Awards� at 583 Park Avenue on May 9, 2017 in New York City. (Photo by Dimitrios Kambouris/Getty Images for David Lynch Foundation)
NEW YORK, NY - MAY 09: Model Gisele Bundchen attends David Lynch Foundation Hosts �Women of Vision Awards� at 583 Park Avenue on May 9, 2017 in New York City. (Photo by Dimitrios Kambouris/Getty Images for David Lynch Foundation)
NEW YORK, NY - MAY 01: Model Gisele Bundchen is seen at the 'Rei Kawakubo/Comme des Garcons: Art Of The In-Between' Costume Institute Gala at Metropolitan Museum of Art on May 1, 2017 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
NEW YORK, USA - MAY 01 : Co-Chairperson Gisele Bundchen attends the 'Rei Kawakubo / Comme des Garcons: Art Of The In-Between' Costume Institute Gala 2017 at Metropolitan Museum of Art in New York, United States on May 01, 2017. (Photo by Philip Rock/Anadolu Agency/Getty Images)
NEW YORK, NY - MAY 01: Gisele Bundchen and Tom Brady at Metropolitan Museum of Art on May 1, 2017 in New York City. (Photo by Ron Galella, Ltd./WireImage)
MEXICO CITY, MEXICO - OCTOBER 27: (L-R) Pantene ambassadresses Chiara Ferragni, Gisele Bundchen and Ana Brenda Contreras attend the Pantene Institute launch at Paseo Interlomas on October 27, 2016 in Mexico City, Mexico. (Photo by Victor Chavez/WireImage)
MEXICO CITY, MEXICO - OCTOBER 27: (L-R) Procter & Gamble Mexico Director, Marcio Andreazzi, Pantene ambassadresses Chiara Ferragni, Gisele Bundchen and Ana Brenda Contreras attend the Pantene Institute launch at Paseo Interlomas on October 27, 2016 in Mexico City, Mexico. (Photo by Victor Chavez/WireImage)
NEW YORK, NY - SEPTEMBER 21: Model Gisele Bundchen attends National Geographic's 'Years Of Living Dangerously' Season 2 World Premiere at American Museum of Natural History on September 21, 2016 in New York City. (Photo by Gary Gershoff/WireImage)
NEW YORK, NY - SEPTEMBER 21: Model and YEARS correspondent Gisele Bundchen attends National Geographic's 'Years Of Living Dangerously' Season 2 World Premiere at American Museum of Natural History on September 21, 2016 in New York City. (Photo by Gary Gershoff/WireImage)
NEW YORK, NY - APRIL 30: (EXCLUSIVE COVERAGE) Gisele Bundchen and hair stylist attend the Gisele Bundchen Spring Fling book launch on April 30, 2016 in New York City. (Photo by Bryan Bedder/Getty Images for Goat Communications)
NEW YORK, NY - APRIL 30: (EXCLUSIVE COVERAGE) Gisele Bundchen and Katie Mossman attend the Gisele Bundchen Spring Fling book launch on April 30, 2016 in New York City. (Photo by Bryan Bedder/Getty Images for Goat Communications)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0459 -- Pictured: Fashion Model Gisele B??ndchen during an interview on April 27, 2016 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0459 -- Pictured: (l-r) Fashion Model Gisele B??????ndchen during an interview with host Jimmy Fallon on April 27, 2016 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
SAO PAULO, BRAZIL - NOVEMBER 06: Brazilian model Gisele Bundchen poses for pictures during her book signing on November 06, 2015 in Sao Paulo, Brazil. (Photo by Vanessa Carvalho/Brazil Photo Press/LatinContent/Getty Images)
SAO PAULO, BRAZIL - NOVEMBER 06: Brazilian model Gisele Bundchen poses for pictures during her book signing on November 06, 2015 in Sao Paulo, Brazil. (Photo by Vanessa Carvalho/Brazil Photo Press/LatinContent/Getty Images)
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