Las Vegas used to be a place Hollywood heavies like Frank Sinatra and Dean Martin went to croon, gamble, and hit on broads (their word not ours!).

Now it's a place Hollywood hotties like Audrina Patridge and Holly Madison go to sit by the pool, sip mojitos, and show off their latest eye-popping swimsuits.

Change is good.

Radar Online has gathered the finest Vegas bikini bods on display at the Mirage, MGM Grand, and all the top Vegas casino pools into one photo gallery.

PHOTOS: Click for Radar's top Sin City bikini bodies.

And FOXNew.som has picked our Top 2 Sin City Bikini Hotties: the previously mentioned Audrina and Holly!

PHOTOS: Click for Audrina Patridge pics.

PHOTOS: Click for Holly Madison pics.

We originally had Kendra Wilkinson in there too, but then she announced she was pregnant, which made us feel kind of icky.

Can one appreciate a barely pregnant woman in a bikini?

A question for another day, perhaps...