Rihanna, 23, canceled a second show in Stockholm, Sweden, on Wednesday -- citing exhaustion.

This was her second this week; she canceled another show on Monday (right, after leaving her concert) and Tweeted a photo of herself on an IV. She canceled the Wednesday show just 40 minutes before it was about to begin, leaving 13,500 fans waiting.

Live Nation Sweden says her health is "really deteriorating."

Refunds will be offered to the audience. Right now, attempts are being made to reschedule the two shows.

Buzz is that the singer was trying to rally herself to perform, but could barely stand.

Madonna's daughter Lourdes Leon and Kelly Osbourne are working hard to promote the Material Girl Model Search in New York.

The threesome posed together on top of the Macy's in NYC. Looks like 15-year-old Lourdes is a full-time career woman, and she's not even old enough to drive!

While up on the roof, Kelly (the face of the brand), was photographed for the clothing line's Spring 2012 campaign.

See more of the rooftop photos in our gallery below.

Jimmy Fallon proved he's a comedic genius with a hilarious performance of "(It's Not My) Baby" ... poking fun at Justin Bieber's reported baby mama drama.

Rocking a leather jacket and Bieber style 'do, Fallon was joined on stage by The Roots.

As for Bieber, himself, he's been slapped with a paternity lawsuit involving 20-year-old Mariah Yeater who claims the 17-year-old heartthrob fathered her son.

Yeater's legal team released the following statement:

"Mariah Yeater is pursuing a modest and rightful claim. There is credible evidence that Justin Bieber is in fact the father of her baby. The evidence will be revealed in court."

The lawyers add, "She is not seeking exorbitant compensation. She merely requests that Justin Bieber provide a DNA sample to verify that he is the father of Mariah Yeater's baby, and if so, to help provide child support as required by California law."

Kim Kardashian will be leaving Australia early due to pressures surrounding her divorce announcement.

The 31-year-old reality star released the following statement:

"I am very disappointed that I am unable to attend the Swisse marquee but I hope to come back and work with the Swisse team at another point in time."

Kardashian was reportedly going to earn $150,000 for an appearance this Saturday at the Melbourne Cup Carnival for Swisse vitamins marquee.

A rep for the company said the following after learning of Kim's cancellation:

"All indications were that Kim wanted to fulfill all of her commitments once she landed in Australia but has obviously changed her mind given her very difficult personal challenges at the moment."

Click thru to read what Kim said about Kris ... and their fan base.

Scream's Emma Roberts and I Don't Know How She Does It's Olivia Munn are all smiles in their jean jackets from Levi's Spring 2012 collection. Sweet and sexy!

We love how the two ladies rocked the same denim jacket but managed to pull off two totally different looks.

Work it, girls!

Since Scott Disick is the baby daddy to a Kardashian sister, he's definitely used to the ongoing drama that follows his famous family!

We caught up with the reality star in Calabasas, but he decided to stay mum when asked about Kim's recent divorce from Kris Humphries -- which ended after just 72 days of marriage and a lavish $10 million wedding.

But that doesn't mean he's not supporting her decision to split!

After the divorce was announced, Scott re-Tweeted to Khloe: "Never apologize for what you feel. It's like saying sorry for being real."

No doubt about it, Scott is definitely on Team Kim.

Looks like Cruz Beckham inherited his daddy's powerful kicks!

Proud papa David Beckham took his 6-year-old son to taekwondo class in LA, where the budding marshal arts master impressed his dad by showing off some high kicks -- even breaking a board with his foot!

The Galaxy soccer star recently landed a gig as the new face of Sainsbury’s, replacing celebrity chef Jamie Oliver who is stepping down following an 11-year partnership.

Beckham will front the UK grocery chain's "Active Kids" campaign and promote its sponsorship of the London 2012 Paralympic Games.

The Twihards were out in full force last night as Robert Pattinson made his exit from Jimmy Kimmel Live in Hollywood, on Tuesday.

The Water for Elephants star looked a bit dazed and confused as he faced a wall of photographers and screaming fans after the show, but the considerate actor took time to sign autographs and pose for pics, before hurrying off into a waiting car.

The Twilight hottie has been spotted hanging out with girlfriend Kristen Stewart at his West London apartment recently. The actress is busy filming Snow White and the Huntsman, while Rob has been on a publicity tour in Europe for Breaking Dawn, Part 1.

The usually private couple are reportedly set to walk the red carpet together at the Breaking Dawn premiere in LA this month -- we can't wait to see these two finally make an official appearance as a couple!