Hilary Duff is comin' clean about the "toxic" mom group fiasco that took the internet by storm last month ... and is even addressing past drama with Lindsay Lohan ! The "Roommates" singer reflected on all the drama -- new and old -- on her Wednesday appearance on "Call Her Daddy." She first recalls her teenage "nemesis" Lindsay ... who she was often pitted against back in the early aughts -- and with whom she was notoriously involved in a love triangle with the late Aaron Carter . But, the