Lester Cohen, WireImage
Entertainment Tonight reports there is no word yet on Kelly's condition.
The Osbourne family's health has made headlines in recent years.
Last year, Sharon Osbourne underwent a double mastectomy in a preventive procedure and Jack Osbourne was diagnosed with multiple sclerosis.
Two weeks ago, Kelly tweeted that she sprained her ankle after falling in a bathroom.
Update (3/7/2013 4:03 p.m.): TMZ reports that Kelly was filming an episode of the show in front of a full audience. She turned to Melissa Rivers, who was filling in for Giuliana Rancic, and said "I don't feel good." She then fell out of the chair and began shaking. An emergency responder from the audience reportedly ran to help and Kelly came around moments later, although she was taken to a nearby hospital as a precaution.
Accident-Prone Stars
- Kelly Osbourne
- Justin Bieber
- Jessie J
- P!nk
- SkyBlu of LMFAO
- Rihanna
- Sean "Diddy" Combs
- Grammys 2013: Red Carpet (Photos)
- Jennifer Lopez
- Taylor Swift
- Beyoncé
- Katy Perry
- Carrie Underwood
- Adele
- Rihanna
- Alicia Keys
- Miranda Lambert
- Justin Timberlake
- Florence Welch
- Carly Rae Jepsen
- Little Big Town
- Chris Brown
- Miguel
- John Mayer
- Jack White
- Natasha Bedingfield
- Tim McGraw and Faith Hill
- Bonnie Raitt
- Ashanti
- Kelly Rowland
- Hunter Hayes
- Ed Sheeran
- Kimbra
- Mumford & Sons
- Ronnie Dunn
- Skylar Grey
- Fun.
- Nas
- Janelle Monae
- Frank Ocean
- Kaya Jones
- Chauncey Hollis
- Erica Campbell
- DJ Michelle Pesce
- Gotye
- Lupe Fiasco
- Ali Tamposi
- Carla Morrison
- D'manti
- Estelle
- Karlie Kloss
- Rocsi Diaz
- Sway
- Carrie Keagan
- Erica Campbell
- Lila Downs
- Guy Sebastian
- Bonnie McKee
- 2 Chainz
- Ne-Yo
- Rick Ross
- Trey Songz
Kelly Osbourne at the Grammys
Taylor Swift Dominates at 2013 Billboard Music Awards
Kellie Pickler Named 'Dancing With the Stars' Champion
Beyonce Releases New Anthem, 'Grown Woman'
J. Cole Performs 'Born Sinner' on 'Late Night With Jimmy Fallon,' Reveals Competitive Spirit Against Kanye West
Carrie Underwood 'Goats' Hunter Hayes With Blown Away Tour Prank
LOOK: Bank Vault Saves 22 Lives During Tornado
Blake Shelton Will Return for Season 5 of 'The Voice'
PHOTO: Dog Guards Dead Victim's Body After Oklahoma Tornado Disaster
Toby Keith Says His Hometown of Moore, Oklahoma 'Will Perservere' After Deadly Tornado
Demi Looks FANTASTIC In A Bikini
Toby Keith Returns to Help Family, Friends in Moore, Oklahoma
Man Reportedly Beheaded In Brutal Assault In London Neighborhood
Blake Shelton Joins NBC in Organizing Oklahoma Tornado Benefit Concert
Brave Woman Stood Down Armed London Attackers
Miguel and Fan Are 'Okay' After Crazy Kick at 2013 Billboard Music Awards
Mother Dies With Infant During Oklahoma Tornado
U.S. Acknowledges Four American Citizens Killed In Drone Strikes
Wolf Blitzer's Embarrassing Moment With Tornado Survivor
Mum-Of-Two Faces Down Woolwich Attack Suspects
Surgeon's Remove Giant Hairball From Tiger
Help For Heroes Killing
PHOTOS: Christie Brinkley Gets Back Into A Swimsuit At 59 Years Old
The World's Most Powerful Women
NY Times Eviscerates Obama White House
Singer Sues McDonald's, Claims Chicken Sandwich Incident Ruined Her Voice
PHOTOS: Tornado Aftermath Leaves Trail Of Destruction
Who Won 'DWTS'?
White Father Allegedly Suspected Of Kidnapping Biracial Daughters
PHOTOS: This Is The Best Response To Abercrombie CEO Mike Jeffries We've Seen Yet
Tornadoes Strike Oklahoma
Tara Ellison: Why I Gave A Toast At My Ex-Husband's Wedding
Police END Search For Susan Powell
PHOTOS: Tornadoes Wreak Havoc On Central U.S.