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These summer studs have been ripping right into swimsuit season with their abs simmering in the sun. And, with months of preparation and going hardcore in the gym ... there seems to be a common theme amongst these Hollywood dudes: showin' off their rock hard bods!

Add some eye candy to your summer with actors, influencers, TV stars and more; all who have shown up, and boy oh boy are they showin' out ... the proof is in the pics, abs-olutely!

Putting your celeb knowledge on the line ... have you come prepared to identify which Hollywood hunk is in the bare-chested shot?!

American actress Maria Thayer was 30 years old when she played the smart and pretty high school graduate, determined to get accepted into Yale University Rory -- in the comedy/teen film "Accepted" back in 2006.

Thayer shared the big screen with Justin Long as the slacker who invented the fake college, "South Harmon Institute of Technology," aka 'S.H.I.T.,' Bartleby, Blake Lively as Bartleby's love interest who makes the transfer to 'S.H.I.T,' Monica, and Jonah Hill as the nerdy friend looking to join a fraternity, Sherman.

Maria was also in the films, "Forgetting Sarah Marshall" and "Hitch."

Before this Los Angeles native in her ladybug outfit was acting in movies like 'Scooby-Doo' and "Lemonade Mouth," she was just enjoying her summer popsicles, becoming a child star and leading her high school's step team.

Before releasing (just one) of her hits -- "Girls Like Girls" in 2015, her singing career started back in well over a decade ago when she joined the all-girl group, The Stunners, which consisted of 5 members including Tinashe ... She's a true triple threat!

Need one more hint? She enjoys sharing vacay pics with her girlfriend, "The Bachelor" star Becca Tilley.

American actress Samaire Armstrong was 22 years old when she first started playing the role of Anna Stern -- the cute comic book reader from Pittsburgh with a witty personality -- in the teen drama series "The O.C." back in 2003.

Armstrong was part of an ensemble cast including Mischa Barton as the pretty and troubled teen, Marissa Cooper, Adam Brody as the nerdy comic book guru and Anna's love interest, Seth Cohen and Rachel Bilson as the materialistic and at times judgmental, Summer Roberts.

Most recently, Samaire ran for mayor of Sedona, Arizona.

Before this smizing sweetie in her red, white, and blue crop top turned into an author and an attorney, she was just posing next to her father's Buick Electra 225, playing the piano, and growing up in Chicago, Illinois.

Being quite the intelligent lady and a doting mother to her two daughters, it comes as no surprise that one of her kiddos recently graduated from Harvard University. She's also no stranger to sitting in on talk shows such as "The Tonight Show Starring Jimmy Fallon" and "The Ellen DeGeneres Show."

Need one more clue? First Lady!

In honor of the big holiday weekend, we've assembled all the famous folks throwin' more than just their buns up on the grill 😜. So, before you meal prep and marinate your festive feast, get yourself some grilling inspo. straight from the stars!

Total grill master Ryan Seacrest "wheeled" out his finest barbecuing techniques (and his biceps 💪), while New York housewife Jill Zarin served up some heat 'n meat in the Hamptons, and feast your eyes on "Vampire Diaries" star Kat Graham who snapped a weenie shot ... hot diggity dog!

American actor Michael Conner Humphreys was just 8 years old when he played the young version of Forrest -- who grew up in rural Alabama during the 1950s -- in the 1994 drama/romance film "Forrest Gump".

Humphreys was part of a legendary cast including Tom Hanks as the ping-pong pro who joined the US army and served in Vietnam, Forrest Gump, Robin Wright as the hippie trying to find her way in life, Jenny and Sally Field as Forrest's loving and supportive mother, Mrs. Gump.

Following his high school graduation, Michael enlisted in the US Army in 2004 and completed his service in 2008.

"Run Forrest, Run!"

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!