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Katy Perry's looks over the years have shined bright like a "Firework!"

Here is a 26-year-old version of the bedazzled babe standing tall and having a ball during the "VH1 Divas Salute The Troops" in Miramar, California back in 2010 (left). This was around the same year she dropped her mega-hit song "Firework."

And, 13 years later the hot momma recently ignited her explosive voice -- looking like no time has passed for the pop icon -- during the U.K.'s Coronation concert at Windsor Castle (right).

"Cause baby, you're a firework!"

Mrs. Perry has definitely "bloomed" into a beautiful star, but the question is ...

The thermometers are starting to top off and there's a smell of sunblock in the air, which can mean only one thing ... It's time to kick off the TMZ Summer Hot Shots features!

This year we are starting off the Fourth of July holiday weekend with the eye-popping influencer Eve Plourde ... a real red-hot firecracker complete with a cheeky checker print bikini and a matching pair of cherry shades!

When Eve isn't looking at life through her rose-colored glasses, she uses her artistic eye to stick it to her customers at her tattoo shop and leaves the competition in the dust in her tricked-out 2014 Subaru WRX.

Vroom-Vroom!

Hidden behind this star-studded stud with the busting biceps is a former footballer turned Hollywood personality who started popping up on TV shows like Chris Rock's "Everybody Hates Chris." And today, you can catch him kickin' it on the big stage with Simon Cowell.

Aside from his athletic skills, he's also known for his pec-poppin' dance moves ... he's clearly not afraid of sharp objects as he's seen here holding a cactus, and he had a Rottweiler with razor-sharp-teeth in "White Chicks!"

Can you guess the buff bro decked out in red, white and blue?!

From "The Real Housewives of New York City" to a self-made entrepreneur ... when Bethenny Frankel steps out, you know she means business! Put down your Skinny Girl margs and see if you can bottle up the discreet changes in these two shots!

The business mogul happily strutted her stuff in the Big Apple ... heading into 'The Today Show' where she recently sat in for Jenna Bush. Wearing a bright blue romper, Ms. Frankel was up and at 'em with her bottle and bags in tow (and presumably her other essentials being rolled in).

"Commit to the Bit!"

Hollywood was feeling the heat (and themselves) this month and couldn't help but toss their sultry selfies up on socials! From tropical bikini shots to bare-skinned babes posted up, there was absolutely no holding back from these stars lookin' like a summer snack!

The hot meter was through the roof ... so much so, Kourtney Kardashian showed off her baby bump in a revealing bikini, Ricky Martin stripped down to nothing but his Calvins and Rosalia snapped a topless selfie shot.

Before this pretty ballerina in her white tutu turned into a television personality and actress, she was just exploring the concrete jungle with her three younger siblings, rehearsing for her dance recitals and growing up in Brooklyn, New York.

Kicking off her career in radio, she landed as a host on MTV's "Total Request Live" aka "TRL" during the early 2000s. She's also acted in movies like "Two Can Play That Game" with Vivica A. Fox and Gabrielle Union ... as well as "Think Like A Man" with Kevin Hart.

Need one more clue? Just ask her bestie Kim Kardashian!

English actress and model Vanessa Angel was 29 years old when she was cast to play the role of Claudia -- the beautiful and funny girlfriend who hilariously schemes her way to winning lots of money -- in the comedy film "Kingpin" back in 1996.

Woody Harrelson starred as the kid who was raised to bowl before his hand is injured in a match, Roy, Bill Murray as the hustler and cocky bowler willing to do whatever it takes to win, Ernie and Randy Quaid as the Amish farmer who keeps his bowling talents hidden from his family, Ishmael.

Canadian actress Lisa Jakub was only 14 when she was cast to play Lydia Hillard -- the eldest of the three Hillard kiddos, who helps her siblings navigate through their parents' divorce -- in the 1993 family film, "Mrs. Doubtfire."

Lisa shared the big screen with the late Robin Williams as the funny father-turned-nanny, Mrs. Doubtfire, Sally Field as the more stern and stressed-out parent, Miranda, Matthew Lawrence as the sporty middle child, and Mara Wilson as the third and youngest child.

Today, Lisa is all about mental health, staying active and is a certified yoga teacher.

Harrison Ford sees age as just a number, sayin' he's got no plans to retire despite turning 80 ... so here are some other senior celebs who have also hit the big milestone without stopping!

Good ol' Indiana Jones isn't alone when it comes to timeless talent -- Martha Stewart's still cooking at 81, and looks GREAT doing it, while Morgan Freeman's appearing in countless projects as the years go on ... with 6 more in production!

Even Mick Jagger, who will be celebrating the big 8-0 next month, still has the moves ... just like he did when the Rolling Stones debuted back in 1962.

Countless others fit the same bill as these legends -- like Clint Eastwood, Rita Moreno, Al Pacino, Patrick Stewart, Michael Caine and James Earl Jones!

Before this adorable baby drooling on his yellow smock was spittin' beats and rapping on stage, he was just clapping his hands, flashing his pearly whites for the camera, and during his teen years ... was entering rap contests while growing up in Detroit, Michigan.

You've probably heard his popular song "I Don't F With You", but if you haven't ... he's worked with some of the music biz's hottest stars including Nicki Minaj and Drake. Through his music, his listeners have learned he's definitely "one man who can change the world."

Need one more hint? He's a proud father of one!

Kaley Cuoco's looks over the years are 'Bangin!'

Here is a 21-year-old version of the blonde beauty shooting a promo pic for "The Big Bang Theory" in Los Angeles back in 2007 (left). This was just the beginning of her 12-season run on the hit show, playing the role of Penny.

And, 16 years later the beautiful actress has diverted from her blonde days and recently freshened up -- going brunette -- at the premiere for Peacock's "Based On A True Story" in WeHo (right).

True story ... she's still a force to be reckoned with in Hollywood, but the question is ...

"Come on over," and see if you've got what it takes to descramble this celeb!

Hidden within the stretched-out snap is a talented star who’s done everything from burlesque to mentoring aspiring musicians, and if she likes what she hears, she may just buzz you to the next round.

This famous face takes it all the way back to the “Mickey Mouse Club” days, and in her early 20s... she showed her fans how to be a "Fighter"! She's also got the moves to back up her amazing vocals.

Celebs came out in force Friday for the Dior Fashion Week Show in France ... and the futuristic event dazzled the Hollywood luminaries.

A bevy of stars showed up at Ecole Militaire in central Paris for the kick-off of the summer spectacle by Dior men's artistic director Kim Jones.

Among the bold-faced names were Winnie Harlow, Demi Moore, Pharrell Williams, Offset, J Balvin, Gwendoline Christie, Amber Valletta and Caleb McLaughlin.

Once they all got inside, they were treated to an innovative performance by a rotating continuum of models who rose up from under the floor onto a metallic catwalk to strut their stuff.

The models paraded around the room, wearing androgynous suits with funky glasses and hats topped off by pearls and sequins, giving the performance a very modern feel.

There's "no doubt" that all eyes are on Gwen Stefani when she steps away from her work on her new single "True Babe" and starts struttin' down the streets! Put your best foot forward to see if you could highlight the differences in these two images that are B-A-N-A-N-A-S!

The singer and "The Voice" host may look like she's "just a girl" in England showing some love to her beauty brand ... but can you makeup your mind and find the minor changes in these tricky pics?

"What are you waiting for?!"

Before this adorable gal with brown hair posing for the camera turned into a famous model, she was just motorbike racing, riding horses on her Grandma's farm and growing up in Sydney, Australia before moving to Brisbane!

Her successful modeling career took off when she was just a young teen and has continued into her 40s. Back in 2007, she made a guest appearance on the CBS show "How I Met Your Mother" alongside other big-time models like Alessandra Ambrosio and Heidi Klum.

Need one more clue? Just ask her hubby, Snapchat CEO Evan Spiegel!

American actor Michael Angarano was just 12 years old when he was cast as the young William Miller -- who would later become a journalist for Rolling Stone magazine, tagging along with the band, Stillwater, for their cross-country tour -- in the 2000 movie "Almost Famous."

Angarano shared the big screen with Hollywood greats including Patrick Fugit as the 15-year-old version of William Miller, Billy Crudup as the lead guitarist of Stillwater, Russell Hammond and Kate Hudson as the #1 groupie of the band who is in love with Russell, Penny Lane.

Michael also played the role of Nick alongside Meryl Streep in the 1999 musical film "Music of the Heart."