Keyshawn Johnson -- I'm NOT Moving Because of Justin Bieber

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Keyshawn Johnson
I'm NOT Moving
Because of Bieber
Keyshawn Johnson is saying sayonara to his Calabasas mansion -- but the ex-NFL star is adamant the move has NOTHING to do with his beef with his pain in the ass neighbor Justin Bieber. 

TMZ spoke with a rep for the ESPN star who tells us, "Keyshawn is not moving to get away from Bieber. He's moving to be closer to the high school where he'll be coaching and where his son will be playing football."

Keyshawn recently took a job as a wide receivers coach at Mission Viejo High School in Orange County, CA ... where his son will go to school in the fall.

FYI -- MSVH is a high school football powerhouse and Key's rep tells us Johnson took the job with the varsity team to "have fun" while his kid pays his dues on the JV squad.

Of course, Key probably won't miss Bieber when he parts ways with his Calabasas palace -- 'cause as everyone knows, Justin has been the neighbor from hell ... partying on the time and speeding up and down the quiet streets in their private gated community.

Key's 11,746 square foot home is currently on the market for $8.5 mil. We're told Johnson plans to move to another mansion near the high school  ... but he's very interested in coming back to the Calabasas area in a few years ... 'cause he likes it out there.

Hopefully, Justin will have moved by then.

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Video Shows Justin Bieber WASN'T Driving Ferrari in Keyshawn Johnson Confrontation

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Justin Bieber
VIDEO SHOWS HE WASN'T THE DRIVER

Score one for Justin Bieber ... he was NOT driving his Ferrari the day Keyshawn Johnson confronted him for reckless driving -- and there's video that proves it.

Law enforcement sources tell TMZ ... L.A. County Sheriff's Deputies went to Justin's Calabasas home to check out security video from Memorial Day -- that's when Keyshawn and other neighbors claimed Justin was driving at breakneck speeds through their neighborhood, endangering adults, children and pets.

Tyler the Creator told TMZ last night ... HE was driving the Ferrari ... not Justin.  We've learned the video shows just that.

Law enforcement sources tell us ... the 5-minute video shows the Ferrari pulling into Justin's driveway with Tyler behind the wheel.  Justin follows closely behind on his motorcycle.

Keyshawn shows up 30 seconds later, as Tyler gets out of the car and Justin gets in so he can make the tight maneuver into the garage.

Here's the conundrum ... at least one witness insists Justin was driving the car, but the video doesn't show it.

Law enforcement sources tell TMZ ... the Sheriff's Dept. will send the case over to the L.A. County D.A. for review, but one source says it's "highly unlikely" the D.A. will file criminal charges against anyone.