Lady Gaga

Days after crumpling to the floor during a New Zealand concert, Lady Gaga explained her alarming performance.

"I was so jet lagged," she told the Australian radio show Kyle and Jackie O on Friday. "I passed out about three times on stage that night but I got myself to the floor. I'd rather die on stage than walk off because I was going to pass out."

This isn't the first time that Gaga's whirlwind rise to superstardom has taken its toll. Back in January, she was forced to cancel several shows, citing exhaustion.

One source fears that the pop star is suffering from the stress of her staggering fame. "She's on the verge of tipping," says the source. "She's only human."

Still, the singer insisted on the radio show that she's feeling "completely rejuvenated and excited."

Heidi Montag

After filming six seasons of MTV's The Hills, Heidi Montag is ready to say goodbye to the show that shot her to reality fame.

"I'm so excited The Hills is finally over and I can now become a full time motion picture actress," Montag tells PEOPLE exclusively of the news that the show will come to an end. "There is no better training [for an actor] than being in front of the cameras 24-7."

Although her dream of becoming a pop star never quite materialized, Montag says her movie career is moving full steam ahead.

"After working with Oscar-winner Ron Howard on a short film project [for FunnyorDie.com] and then working for days with the comedic genius director Dennis Dugan and his team of brilliant comedy visionaries at Happy Madison on Just Go With It starring Adam Sandler and Jennifer Aniston, I have been able to truly find what makes me the happiest in life," Montag says.

And what might that be? "Getting to truly show the world my creative ability ... while playing ... different characters."

One of the characters Montag wants to play is "a lifeguard named Summer" in a script she wrote herself.

"I am making the first 3-D beach comedy about a shark that attacks a small beach town and I save the day with my 3-D boobs," Montag says. "I've even written a role for Dolly Parton to play the town mayor!"

And while that project has yet to be greenlit, Montag is as confident as ever that she'll make a splash in the film industry. Says Montag, "I'm now finally free to start my career and my new life as female mogul in Hollywood!"

By Jennifer Garcia

Demi Lovato

Demi Lovato and Joe Jonas may have only recently gone public about being a couple - but the teen star isn't exactly shy about sharing her feelings for her beau.

"It's amazing!" she gushed to the Canadian entertainment show eTalk at Saturday's Nickelodeon Kids' Choice Awards. "It's a great feeling! When you're in love, you want the world to know!"

The couple have earned themselves a nickname that puts them on par with such major celebrity pairs as Brad Pitt and Angelina Jolie as well as Tom Cruise and Katie Holmes.

"They call us 'Jemi,' which I think is pretty funny," said Lovato.

Lovato, 17, also told eTalk that she gets stopped on the street by strangers who want to know what's going on with her beau, 20.

"It's really weird, because random strangers will be like, 'How's Joe?' " she said. "And I'm just like, 'What?' But it's fun. It's really special, and we're having a good time."

The pair met on the set of Camp Rock in 2007 and grew close the following year, when Lovato toured with the Jonas Brothers. Last week, they performed their duet "Make a Wave" on American Idol.

Suri Cruise

Suri Cruise rang in her fourth birthday Sunday at home in Los Angeles with her girlfriends. The party's theme? It was a tea-party celebration, complete with cupcakes, which party guests decorated, a treasure hunt and a dip in the pool.

Last year, parents Tom Cruise and Katie Holmes planned a similarly lowkey, Princess-themed celebration at their home for their daughter's third birthday.

Suri has recently been spending time in New York with Holmes, who is also filming a new movie, Son of No One.

Julie Jordan

Pink

Pink has been coy about rampant rumors that she's pregnant, but a rep for the singer has a clear message: "Pink is not expecting." 



Rumors began circulating earlier this month that the singer and her husband, Carey Hart, might be expanding their family after Pink was photographed appearing to have a slight baby bump.

In a move that had fans wondering if she was joking or dropping hints, Pink posted a message on Twitter last week, saying "Off to the gym. Lord knows when this 600-lb baby comes out that I've been growing for 8 years, i better be strong and physically prepared!!!" Good to know she has a strong sense of humor.

Marla Lehner and Jessica Herndon