Lamar Odom is a champion once again -- the ex-NBA superstar just KNOCKED OUT Aaron Carter in their Celebrity Boxing match!!!
Carter came out SWINGING ... hitting Odon with as many punches as his body could handle ... but it was clear from the jump -- Odom was in control.
The 6'10" Odom and 6'0" Carter duked it out for 2 rounds at the Showboat Hotel in Atlantic City ... but it was clear from the first bell -- the Lakers champion was gonna have no issue handing the former pop star in the ring.