"Twilight" star Kellan Lutz fine tunes his ridiculous physique with a ridiculous workout ... in a PLAYGROUND! We can all agree -- monkey bars were NEVER put to better use than this.

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Here's "Twilight" muscle hunk Kellan Lutz at an event in the Hamptons this weekend (left) -- and former 'NSYNC lead singer Justin Timberlake back in 2000 (right).



One said bye, bye, bye to their look.

We're just sayin'.

Despite reports that they had broken up, AnnaLynne McCord was spotted in a bad wig and sunglasses with Kellan Lutz ... at a low budget motel in Studio City this morning.


Busted.

Consistently shirtless "Twilight" stud Taylor Lautner Kellan Lutz definitely measured up ... when getting his loincloth sized on the Canadian set of his new non-Vampire flick "Immortals" on Tuesday.


In the film, the buff 25-year-old plays the Greek god Poseidon. What a stretch!

"Twilight" hunk Kellan Lutz and his smokin' hot "90210" girlfriend AnnaLynne McCord soaked their smooth, ripped and hairless bodies in the waters of St. Maarten this weekend.



Hopefully they used protection.

"Twilight" hunk Kellan Lutz, "True Blood" star Stephen Moyer and "Vampire Diaries" hottie Paul Wesley vamped it up at the same event in NYC on Monday.



Question is ...

It was hunkapalooza in NYC this weekend as Jared Leto, 38, Chace Crawford, 24, Ryan Phillippe, 35, and Kellan Lutz, 24, all showed up to the Calvin Klein fashion show.



Question is ...

Hell hath no fury like a "Twi-hard" scorned ... fortunately, Kellan Lutz is one talented unscorner.


Amidst the chaos at last night's big Westwood premiere of "New Moon," one extremely passionate mama went off on some of the stars when they wouldn't stop to sign autographs.

But while her daughter wretched with embarrassment, mama's tactics eventually worked -- she somehow got Kellan's attention and the dude actually stopped to take some pics with her extremely lucky daughter!

Forget about the Wolf Pack or the Volturi -- the TwilightMOMS are the ones to watch out for.

While working out at a Vancouver gym, "Twilight" musclehead Kellan Lutz flexed and posed for his biggest fan ... himself.



Who can blame the pumped up and body hair-free 24-year-old for liking what he sees?!

Kellan Lutz took his hairless buff pecs, bis and abs on a run through Vancouver on Thursday.



When you're the "Twilight" hunk that isn't R-Patz or Taylor Lautner, you gotta take your fitness regime to the streets.

Kellan Lutz plays a vampire in those "Twilight" films -- but it's his ride that really sucks.


The hot-bodied star left Mel's Diner driving every 40-year-old mother's ride of choice -- a white mini van -- and the paps rightly let him have it.