Kourtney Kardashian and her ex Scott Disick's youngest child hopped on IG Live with Alabama Barker's BF, Scooter Jackson -- and when a commenter boldly claimed he was Justin Bieber's son, Reign looked totally dumbfounded.
Scott Disick's Son Reign Disick Shuts Down Rumors Justin Bieber's His Dad | TMZ TV
Credit: TMZ
Duration: 01:13s
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