Justin Bieber Says He Wasn't Serious About Fighting Tom Cruise The popstar turned heads last weekend after
issuing a MMA challenge out of nowhere to the actor. Justin Bieber, via Twitter But Bieber now tells TMZ that his proposition was just "a random tweet." The 25-year-old even says
he would lose in a fight with
the 'Mission: Impossible' star. Justin Bieber, via TMZ Bieber adds that he's not
in the same weight class
as the 56-year-old Cruise.