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Kelly Osbourne's feeling emotional on her first Father's Day without Ozzy Osbourne ... penning a tribute to her old man on Instagram.

The actress and television personality posted a series of photos with her dad ... photos that show her when she was just a toddler and continuing up through more recent years.

Kelly writes that she still finds herself wanting to reach out to her dad for advice or to tell a joke ... adding the ache of missing him is simply the price of loving him -- and she'd rather pay it every day then never have the honor of being his daughter.

Jennifer Lopez kept things cool Saturday night while attending Ariana Grande's "Eternal Sunshine" concert in L.A. ... but even a low-key night out didn’t stop fans from spotting her among the crowd.

TMZ obtained video of JLo inside the crowd, fully in vibe mode as she enjoyed the show from her V.I.P. seat. However JLo wasn’t drawing attention to herself -- no big entrance, no theatrics -- just blending in and taking in the performance like everyone else.

At moments in the clip, she appears relaxed and engaged with the music, keeping her profile low while still clearly enjoying the set. But of course, once a star of her caliber is in the building, it doesn’t take long before nearby fans start doing double-takes.

No summertime sadness here ... because it's Lana Del Rey's birthday!!!

The singer turned 41 today, and that calls for celebration ... the only way we know how.

In honor of the songstress' big day, throw on her discography, crack open a Diet Mountain Dew, and take a look at some of her hottest shots ... we promise, you won't be disappointed.

Rod Stewart had a rough show in Utah last night ... doubling over in discomfort during the set -- and needing puffs from an oxygen tank onstage.

The singer-songwriter hit the stage at Utah First Credit Union Amphitheatre in West Valley City, UT last night ... and he wasn't moving around the stage as much as usual.

Check out the video, obtained by TMZ ... Stewart's supporting himself on musical instruments, barriers and even a pole at the side of the stage.

Jason Derulo hears the backlash about the shark tank he has in his living room ... and tells TMZ he's figuring out what to do about it.

We caught up with the singer in L.A. Thursday, who said his sharks have more space now than they did in the aquarium he bought them from.

That being said, JD promises he's listening to the criticism and trying to find the best way forward.

Christina Aguilera owned the stage for the grand opening of the Obama Presidential Center, ... putting on a powerhouse performance fit for a former president.

Xtina brought the house down in Chicago on Thursday, with a rousing rendition of "What a Wonderful World," showing off her impressive vocals and stage presence.

She stunned in a glittery, ruched dress as Barack Obama, Michelle, and a bunch of other celebs and political figures hung on her every note.

Ariana Grande's concert on her "Eternal Sunshine" tour is bringing out tons of winners ... because a couple of "Victorious" cast members came out to show their love for the star.

The pop star rocked the Kia Forum in Inglewood, California Wednesday night ... and standing in the VIP section were a pair of her former costars on the hit Nickelodeon show ... Elizabeth Gillies and Matt Bennett.

Check out the clip ... the Hollywood Arts High alumni are rocking out to one of Ariana's tracks ... belting out the lyrics along with their longtime pal.

Soulja Boy’s ex-girlfriend is attempting to have his music residuals sold off to collect on a multi-million dollar judgment against him ... TMZ has learned.

According to court docs, obtained by TMZ, a former assistant who then started a two-year romance with the rapper filed a notice announcing her intent to sell Soulja's rights to collect music residuals from Broadcast Music. She said she intends to sell to the highest bidder.

The woman, who filed as a Jane Doe, said the sale will go forward unless Soulja objects.

Beatlemania is officially back ... 'cause the actors playing The Beatles have finally been spotted together in character for the first time ... and it's giving all the feels!

Harris Dickinson, Paul Mescal, Joseph Quinn, and Barry Keoghan were photographed filming in Barcelona for Sam Mendes' massive Beatles movie event, marking the first time the new Fab Four have been seen together on set.

They weren't just hanging around ... it looks like they were recreating one of the band's most iconic moments ... a legendary February 1964 stay at Miami Beach's Deauville Hotel.

Lil Jon is opening up about the heartbreaking loss of his son, DJ Young Slade ... telling us how writing his upcoming memoir became part of his healing process.

We got the rapper at LAX Tuesday, and he told us his son's February death came as he was trying to finish his book, "I Only Shout So You Can Hear Me."

Rather than leave the memoir untouched, Lil Jon says he went back and added new sections about navigating grief and processing the devastating loss.

Lil Nas X is giving fans a rare health update ... and by the sounds of it, he's in a much better place after a stint in rehab.

The rapper resurfaced on social media Wednesday and revealed he's spent the last several months focusing on himself .... going to rehab, therapy and working with a psychiatrist.

Nas also opened up about his bipolar diagnosis ... joking that being bipolar, Black and gay felt like God handed him a particularly challenging set of cards.

A producer who was invited on the doomed helicopter flight that killed Oliver Tree and five others in Brazil says he narrowly escaped tragedy after backing out at the last minute.

Victor Wao revealed on Instagram he was originally supposed to be on the flight Sunday, but his friend, Argentine producer Lucas Vignale, kindly arranged a car ride for him due to his fear of flying ... The New York Post reports.

The change saved Victor's life ... because all six people aboard the helicopter died after it collided with another chopper mid-air in Rio de Janeiro. The others who died were Lucas, YouTuber Gaspi, Lucas Brito Chaves and the pilots of both crafts, Alexandre Souza and Charles Marsillac.

The airships burst into flames and crashed into an electric vehicle yard ... and footage shows first responders surrounding one of the mangled choppers.

Post Malone got emotional remembering Oliver Tree ... dedicating his concert to the late musician after a fatal helicopter crash ... and pouring out some beer for a fallen friend.

Posty took a moment during his Tuesday show in Toronto to honor his late pal, speaking directly to the crowd about Oliver's impact before pouring out some Bud Light.

It was a heartfelt tribute, with Post praising Oliver's art, heart, and soul before addressing him directly ... saying he wanted Oliver to know just how loved he was.

Oliver Tree's girlfriend is speaking out for the first time since he died in a helicopter crash in Brazil ... and she says folks need to shut up about "any other women that Oliver may have been seeing."

Fiona Chernavskaya hopped on social media Wednesday morning and set some boundaries, saying the last thing she needs right now is gossip about Oliver's love life ... claiming they were monogamous and kept their relationship "very intimate."

She thanked those who have been sending kind words and support ... and encouraged folks to show love to others affected by the tragedy as well.

Jon Bon Jovi is finally ready to rock again -- revealing to PEOPLE he's fully recovered four years after undergoing vocal cord surgery and calling the whole experience a "rebirth."

The rock icon opened up about the long road back, admitting that while the surgery was successful, there was a time when his future as a performer was very much up in the air.

Jon says he spent years working with vocal coaches on retraining his voice ... and can now finally say he's back to full strength.

The recovery took far longer than Jon expected, but neither he nor his band ever lost faith the comeback would happen.

Machine Gun Kelly's Tuesday night concert in Michigan was a washout due to bad weather -- and it ultimately got canceled halfway through his performance!  

The singer hit the stage at the outdoor Pine Knob Music Theatre near Detroit -- and cranked out about 4 songs before the rain and thunder rolled in.

We're told security ushered MGK off stage for his own safety and told the packed crowd to shelter in place under the amphitheater's large overhang or in their cars parked nearby.