Justin Bieber jams to Ludacris’ ‘Baby’ performance at Sports Illustrated Party

It’s been over 16 years since it came out, but… Justin Bieber And Ludacris was still having “Baby” fever … as the pop superstar was vibing during the rapper’s performance of their hit at a Super Bowl bash on Saturday.

Luda and The Chainsmokers headlined the “Sports Illustrated The Party” festivities at the Cow Palace Arena on Saturday … making sure attendees got all the bangers ahead of the Big Game.

While Luda can fill a setlist with his own classics, he also gave the crowd his verse on the 2010 track with JB… and the ‘Yukon’ crooner himself was one of the thousands who danced along… he was seen waving his arms with a cigar in his hand.

Once the track was over, the two had a special moment together… when Bieber came on stage to give his pal a hug.

On top of JB and his wife, Hailey … Russell Wilson And Ciara, Rob Gronkowski, George Pickens, Kevin Hart and a whole host of celebrities came along for an evening of fun… with DJ Irie And Xandra providing tunes before Ludacris and The Chainsmokers took over.

SI doesn’t mess around when it comes to hosting events — some cost $1,300… including luxury experiences like VIP lounges, open bar, gourmet snacks and more.

We were told that the venue was packed with visitors enjoying everything the organizers had to offer.

Luda jumped on stage around 11:30 am… and about an hour later the DJ duo closed the evening with a packed set.

If it’s JB approved… we assume everyone left happy.

Pretty much the entire Bay Area was a rave on Saturday night… as Dom Dolla also stepped out on the 1s and 2s in front of a huge crowd at a show in San Jose.