Article continues below advertisementDr. Drew Pinsky shared his take on what may have pushed Britney Spears to enter a reported "30-day" rehab program after her recent DUI arrest.In a Monday, April 13, interview, the TV personality broke down what he believes are the key reasons behind the singer's decision.Article continues below advertisementSource: MEGADr. Drew shared his perspective on Britney Spears' rehab decision.