Ella Mai's fans were shocked after a video of her at her boyfriend Jayson Tatum's NBA championship party surfaced online.

On Monday, the 26-year-old Celtics power forward won his first NBA championship. He and Jaylen Brown led their team to winning their record-breaking 18th NBA title against the Dallas Mavericks, according to the NBA. Shortly after their team's win, they all had a victory party to celebrate.

In the video posted by The Shade Room on Instagram of the Celtics' victory party, the "This Is" singer was spotted walking into the party wearing Tatum's NBA jersey over a black long-sleeved top. The jersey seemingly looked tight on her tummy area because of a possible baby bump.

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Seeing Mai's recent appearance, social media users could not help but share their thoughts and reactions.

"My man got her pregnant, I'm sliding down a wall as we speak," quipped one Instagram user.

"Technically, if you go out, you're announcing your pregnancy. Congrats to her though, she's glowing," another opined.

"She popped? My guy Tatum won life [for real] bro," commented a different person.

"Since when was she pregnant?" asked someone else.

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A different video of Mai showing her possible baby bump was also posted on X, formerly Twitter, and it has since gone viral with over 2 million views, 28,000 hearts and 5,000 reposts.

In the video, the 29-year-old singer seemingly wanted to hug Tatum as they passed by each other in the corridor outside the court.

"So Ella Mai IS pregnant. What a W year Tatum," tweeted the uploader.

"[He's] winning on and off the court, we see. Congratulations," another X user replied to the viral tweet.

"No wonder we can't get no music. Congrats though, girlie," wrote someone else.

The two have always kept what they have low-key since being linked in 2020. While they have been spotted together several times on different occasions, they never made their relationship public, according to People.

The events they were spotted together included Michael Rubin's Fourth of July party in 2022, Mai's 29th birthday in New York in November and the wedding of Tatum's teammate last year.

At the wedding, a video of them singing Ella's song "Boo'd Up" to each other was shared on social media. 

Jayson Tatum
Jayson Tatum attends "NYC Point Gods" premiere at Midnight Theatre on July 26, 2022 in New York City.
(Photo : Theo Wargo/Getty Images)