Justin Bieber lunges at photogrophers in London (FameFlynetUK/FAMEFLYNET PICTURES)

Justin Bieber is back in fighting form, literally.

Although the Canadian crooner collapsed on stage in London on Thursday and was hospitalized, he is still planning to perform tonight for his last of four concerts at the O2 Arena.

Bieber confirmed the news in a Twitter spree Friday morning, in which he also ripped the paparazzi, who had been waiting outside his hotel and caused him to lose his temper.

While “American Idol” is all about the contestants, this season seems to be focused a lot on the competition between judges Nicki Minaj and Mariah Carey. So what do you get when you add two stylish divas and a hit reality show? A fashion faceoff!

On Thursday night, Mariah and Nicki both tweeted pics of themselves, dressed to the nines in designer duds, before taking the stage for the reality show. The “Touch My Body” songstress sported head to toe Tom Ford, while the “Super Bass” singer rocked a skintight Oscar De La Renta dress.

Va-va-voom!

Both ladies looked incredibly stunning, but it comes as no surprise that they would be competitive with their looks on the first live results show.

Check out this vid to see more photos of these ladies battling it out for season 12’s most stylish award.

Kelly Osbourne at the Oscars (Twitter)Kelly Osbourne is speaking out from her hospital bed, where she's recovering from the seizure she suffered on Thursday.

[Related: Kelly Osbourne Hospitalized After Collapsing on ‘Fashion Police’ Set]

Hours after collapsing on the set of E!’s “Fashion Police,” the 28-year-old took to Twitter to update her nearly 3 million followers on her medical condition.

Ariel Winter is opening up about her highly publicized family drama in the April issue of Teen Vogue. The "Modern Family" star moved in with her older sister last year after allegations of physical and emotional abuse were made against her mom.

Now, Ariel and her sister are closer than ever! The 15-year-old actress told the mag, "I didn't know my sister much growing up, and I wasn't really allowed to see her. I know now that my sister is the type of person I'd aspire to grow up to be like. It's really interesting how close you can get with somebody in such a short period."

Ariel also told the mag that her sister is helping her feel like a normal teen by setting nightly curfews, taking her to Six Flags, and encouraging her to spend time with her friends!

Check out the vid to see Ariel on the set of the Teen Vogue photo shoot.

Justin Bieber performs. (Getty Images)Justin Bieber gave fans a good scare on Thursday night.

The "Boyfriend" singer was taken to the hospital following his concert at London's O2 Arena. Bieber, 19, was reportedly experiencing breathing issues on stage.

A rep for the pop star told omg! that the singer "fainted and took a twenty minute reprieve and was given oxygen," and headed to the doctor after the show.

The Biebs himself later addressed his Beliebers via Twitter.

"getting better," he wrote. "thanks for everyone pulling me thru tonight. best fans in the world. figuring out what happened. thanks for the love."

Jennie Garth (Startraksphoto.com)Forced to choose between "Beverly Hills, 90210" hotties Dylan McKay and Brandon Walsh, Kelly Taylor memorably chose … herself.

So it's not at all surprising that Jennie Garth, the actress who played the blond beauty for 10 seasons on the teen sudser, learned some lessons about self-love from her character.

Garth showed off a new tattoo on her upper arm that reads "I love you," as she hit the red carpet for the Lindt Gold Bunny Celebrity Auction in New York on Tuesday.

Brad and Angelina, the winemakers. (WireImage)Brad Pitt and Angelina Jolie might have a little bit more to learn about supply and demand.

The engaged couple’s Miraval Rosé 2012 wine completely sold out all 6,000 bottles in five hours on Thursday, the first day it was available online. "The sale started at 9 a.m., and all the bottles were sold out by 2 p.m.,” Vitabella, the public relations firm representing the Jolie-Pitt’s vineyard, said in a statement.

Chris Brown (Celebrity Monitor/ Splash News)Chris Brown stoked the fires of his beef with rapper Drake at a Hollywood music venue on Wednesday, as he performed a six-song impromptu set after hearing a snippet of his rival's new single.

Brown rolled into The Emerson Theater with a group of friends, after hitting a charity function in at Studio City, California, bowling alley Pinz, and the singer was inspired to do a lot more than party.

When the house DJ cued up Drake's new single "Started From The Bottom," an omg! source says Brown immediately requested a microphone.

"The DJ can play this s***, but I want you all to know…F*** Drake!" Brown said, addressing the club with his middle finger raised.