Kate Walsh, 45, Flaunts Hot Bod in Black Bikini!

Just because it's December, doesn't mean bikini season is over!

"Grey's Anatomy" and "Private Practice" star Kate Walsh, 45, hit the beach this week in Miami -- flaunting her impressive physique in a cute black two-piece.

"Paps just shot my sweet, skinny fat in south beach...ugh, think they got inside my belly button #whiteladyassandbellysyndrome," Kate tweeted after the paparazzi snapped this shot of her getting out of the water.

And while she looks amazing, it doesn't sound like she's dieting at all while she's on vacation.

"I wanna be clear: I'm on a serious food tour of Miami: Zuma, (wow!) casa tua (benisimo) michael's Genuine (ding dong)," she posted later.

See how Kate stacks up against other celeb bikini bods in the gallery above -- plus see some male eye candy too, if that's more your thing!