Paris Hilton Party Nicky Malibu Beach

Lindsay Lohan kept watch over Paris Hilton's Malibu pad Saturday as the heiress hosted a beach party for some friends. Meanwhile, Paris was outside mingling with some hot guys and gals.

As we reported, Lindsay ended up leaving yesterday at 7pm to go home and change before turning back around and returning to Paris' house where she partied until 4am. These girls really have some stamina!