WEST HAM produced another stunning second half fightback as they blew Palace away.
The Hammers were trailing to a clumsy fifth minute goal before hitting back after the break with spectacular strikes from Robert Snodgrass, Javier Hernandez and Felipe Anderson.
Reuters7 Felipe Anderson scored the goal of the day to seal West Ham's comeback
It is the first time since 1982 that West Ham have won three league games in a row and scored three goals in each.
This win follows on from Tuesday night’s 3-1 win against Cardiff City and a 3-0 thrashing of Newcastle exactly a week ago.
The comeback was started by a classy solo effort from Snodgrass three minutes into the second half.
After Pablo Zabaleta’s cross was headed clear by a diving Mamadou Sakho, winger Snodgrass picked up the loose ball and let rip from the edge of the box with a shot that squeezed inside the near post of keeper Wayne Hennessey.
Reuters7 Felipe Anderson celebrates a wonderful third for the Hammers
Reuters7 Javier Hernandez ensured West Ham's fine form continued
Ten minutes later Wales keeper Hennessey managed to push away a free kick from Anderson only for Palace’s defence to stand still as Hernandez pounced and lashed the ball into the roof of the net from close range.
And in the 66th minute Anderson made it 3-1 to cap a superb sweeping surge forwards by The Hammers.
Zabaleta’s pass inside to Hernandez was pushed wide to Anderson and West Ham’s record £47 million signing took one touch before bending a right-footed shot into the far corner.
West Ham had been trailing to a shock fifth minute goal when Patrick van Aanholt swung a free kick into the home box.
Reuters7 The Mexican celebrates scoring West Ham's second of the day
PA:Press Association7 James McArthur opened the scoring after just six minutes
Former Hammers defender James Tomkins headed the ball down and James McArthur cashed in in a similar style to West Ham’s second goal.
The midfielder was clear to prod the ball past Lukasz Fabianski from eight yards out.
Sub Jeff Schlupp also set up a frantic finale when he made it 3-2 with 14 minutes to go.
Reuters7 Robert Snodgrass kick-started a second half comeback
PA:Press Association7 Schlupp set up a nervy finish at the end but West Ham held on