Jennifer Lopez Buying Massive Hamptons Beach Home

9/24/2011 5:45 AM PDT

Jenny from the Block is about to buy herself a whole city block right on the beach in the Hamptons -- Jennifer Lopez is reportedly about to close on a 15,037 square foot home ... listed at just under $18 million!

The seven-bedroom, 9.5 bath, three-story home has an elevator, seven fireplaces, a three-car garage, two laundry rooms ... and a partridge in a pear tree.

Lopez already owns a Hamptons crib with estranged hubby Marc Anthony -- so it looks like she's ready to move on with an exclusive mansion all her own.