Machine Gun Kelly ( MGK ) Swarmed buy fans when leaving the secret rooftop concert in Venice Beach - Video

MGK ended up fine ... and not just, he was met with a crush of people waiting to greet him on his way out -- which we caught on video as well.

There's no question -- he's a rock star ... and got the appropriate treatment upon his exit.

Take it away, Kels!!!

About this concert:

Megan Fox buddies up to Kourtney Kardashian as she supports rockstar beau Machine Gun Kelly at his secret Venice Beach concert

Megan Fox was spotted supporting her rocker beau Machine Gun Kelly at his somewhat precarious-looking secret rooftop show in Venice Beach, CA.

On Saturday the stunning 35-year-old actress was seen beaming during the performance, after giving him a little pep talk and some playful love pats.

Also in attendance was Kourtney Kardashian and her TikTok pal Addison Rae as they showed support for the reality star's boyfriend Travis Barker who played the drums.

The show which was held in collaboration with singer NoCap was a last minute announcement as Kelly — real name Colson Baker — tweeted just an hour and a half before the show: 'venice beach today rainbow lifeguard station 3pm.'

Megan looked phenomenal in a nude bralette and a pair of jeans that showed off her tattoos and very flat stomach which she paired with sky high sparkly heels.

She looked every bit MGK's number one fan as she bobbed her head to his songs while watching with a group of very VIP guests which included Kourtney, Addison, Avril Lavigne's boyfriend ModSun and naturally Barker's kids.

After the show the the pair were seen heading to grab dinner in neighboring Santa Monica with Kelly's daughter Casie.

Megan was seen trying to hold a conversation with the Poosh founder who donned a red striped sweater as she gazed at Barker and took selfies with Addison.

He proved to be quite the daredevil as he looked to nearly almost jump off the building which was only secured with plexiglass walls and even pushed away a drone at one point.

And at one point Megan took to social media to share a video of herself singing to Bloody Valentine — the music video she was tapped to star in after the pair met.

Kourtney was also all smiles as she showed her support with Barker's three kids, daughter Alabama, son Landon, and step daughter Atiana De La Hoya.

From her vantage point she had a clear shot of Travis who banged on the drums and ignited the crowd alongside Kelly.

Kourtney and Megan have hung out on numerous occasions as their boyfriends are both friends and album collaborators.

The pop up performance was also meant to promote a new song of theirs called A Girl Like You which is on the soundtrack for season one of the Amazon movie Paradise City.

Though Megan and MGK began dating before things between Kourtney and Travis turned romantic, once that relationship took off they have both become sort of a foursome.

They celebrated Colson's birthday together where they were seen in couple's shots and also both ladies were in Las Vegas in March where the duo continued to perform.

Both couples have been the subject of engagement rumors as well. Megan was seen sporting a ring on her left finger during Kelly's SNL performance but it was later revealed to be a chunky silver ring that said 'f**k you.'

They did recently however splash out on a $30,000 a month house in the valley that they have been treating like a love nest.

And a new Us Weekly report said that an engagement for Kourtney and Travis could be 'right around the corner,' and they recently purchased a $12M Palm Springs home together for their blended families.