Sometimes second chances don't work out!

Ariana Grande and boyfriend Jai Brooks have called it quits again, Us Weekly reports.

"It has not been an easy few months," a source tells the mag of the "Problems" singer, 21, who recently lost her grandfather. "Jai just wasn’t as supportive as he could have been," the source adds.

The pop star took to her Twitter and posted a cryptic message after news of the split broke. "You learn a lot about love, life and the people around you during a time of crisis. July was painful for many reasons but of all the personal loss I suffered last month, the loss of my grandfather, a true gentleman, was the only one that truly mattered. I thank everybody who was here for me when I needed them as the ones who weren't really broke my heart. August is about to be a beautiful, beautiful month. Looking forward to all the good coming up," she tweeted.

The pair began dating in August 2012, called it off a year later, and then reunited last May.

On Monday night Megan Fox and hubby Brian Austin Green made their way through JFK Airport in New York City, and the actress held on tight to her adorable son Noah. The couple's six-month-old son Bodhi was carried by their nanny, and the group was joined by an extra security detail.

Megan is currently making the rounds to promote Teenage Mutant Ninja Turtles, which hits theaters on August 8. At a press conference in Los Angeles on August 1, Megan mouthed off when asked about the criticism the film has received, specifically for tweaking the origin of the characters a bit.

"Let me tell you something about those people," Fox sniped. "How much money did Transformers 4 make? Exactly. Those people can complain – they all go to the theatre. They're gonna love it – and if they don't love it, they can f*ck off, and that's the end of that." Motherhood certainly hasn't mellowed her out!

Finally some candid details about the wedding of the decade!

Kim Kardashian appeared on Jimmy Kimmel Live on Monday and gave some behind-the-scenes details on her European wedding to Kanye West earlier this summer.

"I think everyone just had such a good time at Versailles that they drank too much. Khloe drank a little too much the night before and I had to wake her up. She was laying down and getting her makeup done while she was sleeping, she was so hungover!" the reality star dished about her sister's antics at the rehearsal dinner.

Kimmy K also seemingly dissed Beyonce and Jay Z when she discussed the bummer of no-show guests, and how it threw a wrench in plans due to the fact the couple had their invitees' names hand-engraved in the stone tables rather than using traditional place cards. "It was the worst. We tried to put white paint and cover the names," she griped.

Despite some bumps in the road, the brunette beauty insists the whole event was a fairytale dream come true! "It was the most amazing experience just to be able to share it with so many family members and friends. We wanted everyone to be on this love journey with us," she gushed.

It seems like married life really agrees with her!

Even when she's been on a plane for 6 hours, she's stunning!

On Monday afternoon Jessica Alba landed at New York City's John F. Kennedy International Airport, and the 33-year-old actress is in town to promote the upcoming Sin City sequel, in which she reprises her role as hottie Nancy Callahan. Yeah, that was the character who made us want to do the P90X ab workout four times a week -- and even after two kids, Jessica's body is still as bangin' as it was when she shot the first film back in 2004.

Sin City: A Dame to Kill For hits theaters on August 22.

Lea Michele and her boyfriend Matthew Paetz worked out on Monday afternoon, and after that the lovebirds stopped by M Cafe in Beverly Hills for a bite to eat.

Paetz, who was once a gigolo (sorry, we're NEVER letting her live that one down) seemed more than happy to chauffeur the Glee starlet around town in her black Range Rover, and the two shared a laugh when they left lunch. Hey, he may not be the type of guy we thought she'd date, but if he makes her happy, maybe his history as a male escort doesn't really matter? Her friends certainly seem to have embraced her new love interest, so time will tell!

The two started dating shortly after they met in April, which in Hollywood is equivalent to about a year, right?

Hilary Duff stepped out in Beverly Hills in a pair of skintight jeans on Monday, and the 26-year-old singer/actress was feeling quite chipper when X17 photographers caught up with her.

Despite the fact that her new single "Chasing The Sun" hasn't been getting the best reviews from critics, let's keep in mind that a) there are other songs on her upcoming album and b) she's been out of the music game for a while. Like, seven years. That's a long time!

On the plus side, she looks smokin' hot in her music video for the song, and she looks great here. See, there's a reason to smile!

From half-naked Instagram pictures to jeans that leave little to the imagination, Kim Kardashian has been all about flaunting her big ol' booty lately! And let's not forget about her other set of lovely lady lumps ... those boobs are about an inch or two away from freedom!

On Monday afternoon Kim taped an appearance on Jimmy Kimmel Live, and the 33-year-old reality TV starlet arrived in a pair of dungarees that showcased her giant derriere, and for her interview she changed into a super skimpy Ulyana Sergeenko jumpsuit with a teal satin duster to cover up her shoulders. She's got to maintain some modesty you know!

There are just two more episodes of Keeping Up With The Kardashians this season, and between Khloe's love life and Rob's meltdown, there's plenty of drama left for a finale -- and for season ten, which premieres later this year. Still, Kim's gotta take a break from jet-setting and make the promotional rounds for her day job. I mean, this (plus her sex tape) is pretty much how she helped build up the family empire...

After her taping she headed to Nobu in West Hollywood for dinner, and while she smiled for the cameras before chowing down on sushi, we're guessing she's missing hubby Kanye West, who jetted off to Singapore on Sunday afternoon after the couple returned from Ibiza on Saturday afternoon.

Cannon baaaaaaall!

Taking a page out of the Ron Burgundy pool party style book, Justin Bieber got wild at the pool, a la Anchor Man on Monday. No pool is safe when Justin is around!

Fresh from his headline-making trip to Ibiza, the Biebs is back in Los Angeles -- and has wasted no time posting his mischievous antics to Instagram.

In the video, the 20-year-old says to the camera, "Back in Cali, back in the studio ... time to get back to work ... but first ... CANNON BALL!"

All work and no play makes JB a dull boy!

Over the weekend, Selena Gomez's human kryptonite joined Kardashians, Kim, Kris, Kylie and even Kanye West, in the sexy Spain island for a birthday party for Givenchy fashion designer Riccardo Tisci last.

The pop star had quite the the blast in the Spanish city, that is, despite coming to blows with actor Orlando Bloom.

Rumor has it that round two of the Bieber-Bloom saga almost kicked off at Tisci's bday bash, but Bloom ended up leaving the party upon seeing Bieber's entourage. Well ... we've seen the "Boyfriend" singer's beefed-up entourage -- we don't really blame the Brit.

Uhh ... we're glad you're back Justin. Los Angeles is so much less interesting with you gone!