Chrissy Teigen didn't hesitate to show the world her new bundle of joy -- she plastered the kid's cute mug just 3 days after popping him out. All we can say ... AWWW.

Chrissy posted a photo Sunday of her and hubby John Legend's baby boy, who they named Miles Theodore Stephens -- solid name after a lot of interesting ones have been flying around lately. BTW, John's real surname is Stephens ... chill, everyone!

As we reported ... Chrissy announced she'd given birth Thursday by writing "Somebody’s herrrrrrre!" with a happy face and baby bottle emojis on social media. This is her and John's second child -- they have a 2-year-old daughter, Luna.

I can confirm postpartum life is 90% better when you don't rip to your butthole. Baby boy: 1 point. Luna: 0

— christine teigen (@chrissyteigen) May 20, 2018

In case you're wondering how Chrissy's doing during her postpartum phase ... it sounds like she's faring better the second time around. TMI? Yes ... we thought so, too.

Shawn Mendes will perform his song "Youth" at the Billboard Music Awards as a tribute to those affected by gun violence, and he'll be joined on stage by the Marjory Stoneman Douglas High School Show Choir.

Sources close to production tell TMZ Mendes and Khalid -- who is featured on the song -- wanted to shed light on the recent tragedies ... including the shooting at Santa Fe High School on Friday that left 10 dead.

"Youth" -- a song with a message about not allowing pain and tragedy to steal a kid's youth -- was released earlier this month after the massacre at MSD in Parkland, Florida which left 17 students and faculty members dead. Our sources say 12 members from the school's show choir will be featured in the performance.

We're told show producers were left scrambling Friday to also work in a tribute to Santa Fe which happened BBMA host Kelly Clarkson's home state of Texas. Production sources say rehearsals for the performance Saturday left those watching in tears.

The Billboard Music Awards will air tonight at 8ET on NBC.

Holy lord ... Beyonce now has her very own church!

Queen Bey's the new owner of a stone structured, 7,500 sq. ft house of God in The Big Easy. The New Orleans church -- which is more than 100 years old -- was listed at $850,000 ... but it's unclear if she got a divine discount.

We're told Beyonce's church was built in the early 1900s, but has been out of commission as a place of worship for some time due to its church members passing away.

Looks like it could be revival time though ... and Beyonce shouldn't have any issues finding folks willing to get in formation and join her congregation. Her sister, Solange, lives nearby, too.

Speaking of ... a San Francisco church held the first ever "Beyonce Mass" a few weeks ago and had more than 900 people show up for it.

Imagine what the turnout would be at the actual Church of Bey.

John Cena made the trek down to San Diego to try to win Nikki Bella back, but as we reported ... it may take more than just AAdvantage Miles.

Nikki and John were spotted together in the Mission Hills neighborhood of San Diego Saturday, strolling down the street after getting their fix of java.

John has been on a unrelenting campaign to win Nikki back ... after she broke up with him because he would not budge on the issue of having children.

Nikki told us a few days ago she now believes John has had a change of heart and would like for her to have his kids, but she says all the drama has made her question the relationship. She told us she loves John and would like things to work out, but she needs time to think.

It's overcast in Southern California, so we don't know if John commissioned a skywriting plane.

Meghan Markle's family provided way more drama than the Royal Wedding, and let's face it ... we hear Laurel. So, we gotta ask ...

Taylor Swift brought her long-time bud Selena Gomez up on stage Saturday night at her Rose Bowl concert.

Selena and Taylor sang "Hands to Myself" -- Selena's song -- in the middle of the "Reputation" concert in Pasadena.

The stadium packed for a second time. Taylor also performed there Friday night.

Selena told the crowd, about Taylor ... "The reason why she has been one of my best friends is because this person has never, ever judge a single decision I've made."

Agree to agree. 

Kylie Jenner took a time out from making money for a Saturday afternoon out with her pals.

Kylie and company hit up Nobu in Malibu. She sat shotgun in a super sweet Lamborghini as they headed back to her home in Hidden Hills.

She probably picked up the tab ... Kylie made a fortune Friday when thousands of people lined up in San Francisco to hit up her pop-up shop ... touted as featuring "custom San Francisco merchandise."

No sign of Stormi or Travis Scott. 

Justin Timberlake made a surprise appearance at David Grutman’s Story Nightclub in Miami Saturday night.

The party was hosted by Puff Daddy and Justin was watching in the wings, when he got a mic and sang "Holy Grail."

Justin was in Miami for his "Man of the Woods" tour, where he performed earlier in the night at the American Airlines Arena. The tour is doing super well. 

We couldn't see his wife, Jessica Biel in the crowd.

Justin's next stop ... Houston, Texas on Wednesday.

Amanda Seales told our photog why she re-tweeted a post explaining that tipping has racist roots.

We got the "Insecure" star Saturday night at Hollywood Improv, where she took us back to the days of reconstruction, where tipping became a substitute for paying black people for their work.

There's a trend to do away with tipping and pay service providers such as waiters a decent salary, but the prevailing practice is still paying close to minimum wage and with tips on the back end.

The "hot cop" who scored a spot on the new season of 'Survivor' is schooling the other contestants on what he's learned from his 15 minutes of fame by warning them to delete "anything that can bite you in the ass over social media."

TMZ has obtained an email Daniel Rengering fired off in a chain with 12 other 'Survivor' contestants where he admits to creeping on their socials and warning them to "fine-tooth comb" anything that could publicly crucify them online.

Daniel warns the "Internet is a cruel, heartless bitch" where "trolls are going to work twice that hard to tear you down, spread nasty gossip and ruin your reputation."

Daniel's seen it happen firsthand after one of the cops in the photo that made him famous was accused of posting several anti-Semitic remarks to his Facebook in 2011, so it appears Daniel's intentions aren't to gloat, but rather to warn the others.

He also adds, "If a small-town country boy like me can host on the GRAMMYs, Oscars and SAG Awards Red Carpets, from a single viral photo, you guys can turn this opportunity into so much more."