Sonakshi Sinha is certainly a busy lady these days. While she is busy promoting her Diwali release Son Of Sardar, the actress will be seen in December again, opposite Salman Khan in the second installment of Dabangg, Dabangg 2. However, the actress says her toughest project is going to be ‘Lootera’, opposite Ranveer Singh and is directed by Vikramaditya Motwane of Udaan fame.