How Romelu Lukaku and Alexis Sanchez celebrated Man Utd's win at Crystal Palace

[PHOTO: COURTESY]

Romelu Lukaku celebrated Manchester United's victory at Crystal Palace by rolling back the years with some classic RnB.

The Belgian posted a black and white clip to his Instagram enjoying Sisqo's 1999 hit Thong Song with Alexis Sanchez.

But, despite the Chilean's move, Lukaku insists his teammate had actually never heard the song before.

Lukaku scored twice as United ran out 3-1 winners at Selhurst Park to extend Ole Gunnar Solskjaer's unbeaten start domestically since taking over at Old Trafford.

The former Everton forward struck either side of half-time before Joel Ward pulled one back for the Eagles.

But Ashley Young made the game safe seven minutes from time with United just a point behind fourth-placed Arsenal in the race for the Champions League spots.

Solskjaer credited Lukaku's two-goal salvo with a change in system which saw the striker operate centrally in a 4-3-3 system.

[PHOTO: COURTESY]

"You hit the nail on the head," Solskjaer said. "He was through the middle today. We created chances for him, he put them away.

"He's done loads of running up and down the line, right wing, left wing, because he's had a different role because of Rashy's form. Today, he got a chance up front and could have got another one as well.

"Very pleased for Rom. He's a quality finisher. He's a professional boy, a good boy, great to have in and around the place.

"He's always happy, always working on his finishing and he's played more than you think, but he's played wide right, wide left, it's Rashy's form that's moved him out there.

"And now with Rashy's injury he grabbed the chance."