Mariah Carey can still hit those high notes!

The American Idol judge hit the stage in New York to perform her classic holiday hit "All I Want For Christmas Is You."

The 42-year-old songstress Tweeted:

“Walking to the stage to perform at Rock center. Let the festivities begin! Thx 2 all the lambs who are braving the temps here! LYM!!!”

Mariah is currently plugging her new holiday single “Christmas Time Is In The Air Again."

Ho, ho, ho!

It looks like Pearl was left with grandpa and grandma!

Jack Osbourne and his wife Lisa Stelly grabbed lunch in Los Feliz yesterday, and the pair decided to leave their baby daughter with a sitter and enjoy some romantic solo time.

The reality star dressed down in a plaid shirt and beanie, while his lady love sexed it up with an "I'M IN LOVE" sweatshirt dress, black boots, and Ozzy-inspired round shades. Is it just us, or does Miss Stelly resemble her mother-in-law Sharon?

The lovebirds enjoyed a video game extravaganza later in the day! Kelly O's big bro tweeted, "After all this time, my wife finally broke down and asked me to play X Box. She got down on Assassins Creed 3."

The couple that games together stays together!

Paris Hilton definitely travels in style!

The gorgeous heiress rocked a flowy dress, white aviator shades and a matching hat ... but we think her hottest accessory is beau River Viiperi.

The sexy twosome arrived at LAX holding hands preparing for their long flight to India.

Nothing like spending more than 12 hours relaxing in first class. Only the best for Princess P and her hunky man!

Lily Allen attended the British Fashion Awards at The Savoy Hotel in London last night, and the 27-year-old singer showed of her bulging baby bump on the red carpet.

Lily is reportedly due to give birth next week to her second child with husband Sam Cooper, so we can't believe she left the house and got all glammed up!

Lily tweeted, "Anyone asking where my dress was from at the @BFA tonight, it was @ALCLTD, bag and shoes @LouisVuitton_UK . Congrats Kim Jones you don you x."

Someone may have slammed her for weight gain, as she later wrote, "I know I have fat arms, but dumbbells are for glum belles." We think she looks great, but there's nothing wrong with hitting the gym every now and then, so she shouldn't be so harsh on the ladies who do!

Ashton Kutcher hit up the Staples Center to watch the Lakers play the Pacers Tuesday night.

Following the game, the Two and a Half Men star was asked about co-star Angus T. Jones' rant against the hit show. In a video message, Jones told viewers, "Please stop watching it and filling your head with filth."

Angus has since apologized for his comments. But regardless, watch Ashton's reaction.

She looks ready for business in this outfit!

Kim Kardashian jetted out of Miami yesterday, and the reality star was more covered up than usual in black pants, a blazer, and stilettos. This can't be the most comfortable travel attire, but we bet she brings clothes to change into on the plane!

Where was Kimmy K headed? Kuwait!

The reality star went overseas to meet with Matthew Tueller, the US Ambassador to Kuwait. We're not sure why the brunette beauty was taking political meetings, but that explains her conservative ensemble!

Adam Lambert has added a new arm tattoo to his ink collection.

The 30-year-old openly-gay former American Idol star posted the above photo and the following:

"It represents my Astrological Birth Chart, along with Pagan, Buddhist, and Greco- Roman Archetypes related to balance and the life cycle."

This past summer, Lambert showed off his tattoo of a Latin phrase on his arm.

As for his latest tat, Lambert added, "My chart is AQUARIUS Sun, Libra Rising, Aries Moon. All three are represented."

Jessica Simpson is already giving daughter Maxwell Drew Johnson a sibling! The Fashion Star mentor and her fiance Eric Johnson are expecting their second child, according to Us.

A source tells the mag, "It definitely wasn't planned. But yes, Jessica is pregnant again."

Maxwell was born only seven months ago at 9 pounds, 13 ounces. Jessica, who is still breastfeeding, recently lost 70-pounds in connection with her multi-million dollar Weight Watchers deal.

The source adds, "She really is overjoyed!"

Aside from news that they're going to be parents again, Jessica and Eric have yet to set a wedding date.