Salman Khan and Katrina Kaif starrer "Tiger Zinda Hai" has brought some much needed cheer to the Bollywood box office in a lacklustre year, by crossing the Rs 300 crore mark since its release. The movie, which hit the screens on December 22, got an extended opening weekends courtesy Christmas. Backed by Yash Raj Films (YRF), the film is a sequel to the Kabir Khan-directed "Ek Tha Tiger" and marks the return of Salman and Katrina together on-screen after five years.