Watch the video here...
KSI got knocked down at WrestleMania XL.
YouTube and rapper KSI joined United States Champion Logan Paul on Friday Night's SmackDown to make a historic announcement.
The Prime partners revealed that their PRIME Hydration drink is now the new sponsor for WWE's Premium Live Events.
However, during the announcement, Randy Orton RKO'd KSI.
Watch the video here:

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