Fresh off her guest stint on "Glee" -- a bikini-clad Britney Spears hit up the beach in Hawaii today ... showing off her ripped boyfriend and her impressively toned tummy. 
Britney Spears & BF -- Looking Belly Good in Hawaii
8/25/2010 8:15 AM PDT BY TMZ STAFF
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who dat
She's nuttier than a fruitcake
mjfan212
WOW SHE GOT SUM OLD LOVIN LOL GOOD LUCK BRIT I WISH YOU THE BEST
where's the boyz
where r her kiddos??
heyyo
You hatin' cuz she sexy!!
Diana
Britney looks gorgeous... cant wait for new album!!!!!!
J
She looks great!!!
supadupa
button's coming loose
serum
I'd paint a white map of Hawaii on that belly.
TMZ@Froggy.biz
Who's the old fart?
Throwback kid
Britney has such beautiful blonde hair, why does she dye her roots dark brown?
Nancy
Why is she always on vacation? FROM WHAT??? Oh, right. Shopping.
OMG! Wonderland
Brit Brit looks better and healthier. Keep it up, although you may need yourself a younger man he is too old!
Tammie
Now let's see the back of her head!!
gemini81
She looks good from the neck down, her face has permanantly gone to hell!! Creepy belly jewelry too, wtf is that?
orangista
I.H.D.A.N's - What on earth are you talking about? I assume it's something racist, but I can't figure out what.