Mets sing “OMG” during crazy champagne celebration

Fifteen years after opening Citi Field, the Mets finally got the chance to celebrate a decisive playoff victory on home soil.

And they made the most of it.

After the Mets came from behind to beat the rival Phillies with a 4-1 win on Wednesday night to win the NLDS in four games, they started the party in the clubhouse – and even went back onto the field – as a crowd of adults greeted them drank drinks while the rest was sprayed.

In the middle of the celebration, infielder Jose Iglesias' song “OMG” played in the locker room as players wearing goggles sang along loudly.

Francisco Lindor, the game's hero with a grand slam in the sixth inning, was seen spraying a bottle of champagne around after hitting one of the ballclub's biggest home runs of the season.

Owner Steve Cohen and his family also joined in on the fun, with the Mets boss posing for photos with an “OMG” sign.

In photos taken by The Post, the Mets could be seen bringing the party back to the field as outfielder Starling Marte sprayed some fans who remained in the home stadium near the first-base dugout.

Outfielder Jesse Winker took it a step further and smoked a celebratory cigar.

Manager Carlos Mendoza, similar to what he had done after securing a spot in the playoffs and after the wild card series, gave another speech to the team to commemorate the victory.

He wanted his players to thank their families, the people behind the scenes and the fans.

“Francisco Lindor calls it 'Mets Nation.' Guess what? We believe you have to keep believing – let's go!” he said before Mets players, coaches and staff opened bottles.

The Mets now wait to see who they will face in the NLDS: the Padres or the Dodgers.