Sienna Says No to Tan Lines

2/22/2007 1:06 PM PST
Sienna Miller and Boytoy of the Month Jamie Burke stripped down and hit the sand for some lovey-dovey R&R.

The warming twosome spent a few days on a secluded beach in the Caribbean earlier this week, swimming, tanning and and being naked -- hot!

Model Burke used to date Kate Moss, Sienna split with alleged nanny-playah Jude Law. Nothing like a hot beach to make one forget ... or remember!