If Travis Barker's looking for another side project it should be party planning ... because the 14th birthday bash he threw his son, Landon, shamed just about every over-the-top Sweet 16.
Travis turned his backyard into a mini-concert and the headliner was Lil Pump. Pump's got the No. 3 album on the charts, so it's a big deal.
We're told there were around 100 guests, including Stevie Wonder's kids and other celeb spawns.
Coolest part ... Landon got to share the stage with Pump and had a Louis Vuitton x Supreme-themed duffel bag cake.
The teen summed it up perfectly ... "Last night was a movie."
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