Katrina Kaif has learnt a new form of belly dancing for her upcoming spy thriller, 'Ek Tha Tiger'. 

After setting the screen ablaze with her item numbers "Sheila Ki Jawaani" and "Chikni Chameli", Katrina Kaif is all set to shake her belly, this time for her own film opposite Salman Khan. 

We heard that the actress has learnt a new dance form of belly dancing floor work for her song "Masha Allah" (watch video) in Kabir Khan's forthcoming film, Ek Tha Tiger. 

A source from the unit says, "The song is the most integral part of the film where Salman is praising Katrina. He feels that she is extremely beautiful and that's why the song is called Masha Allah. When the song was discussed, Katrina was shooting on the borders of Turkey and Iraq and that's when she decided to learn the dance form Belly."

Kat apparently also gave inputs about the way she was to be presented in the number. The source adds, "There are as many as five costume changes in the song and Kat was completely involved in deciding on each of these looks."