Tiger, 25, who impressed the audience with his dance moves in debut film "Heropanti", revealed he lost weight due to rehearsals for the song in "Baaghi".
"Lost weight from all the rehearsing for #Baaghi's song. My most difficult song till date so nervous! But I think you guys will like what's on it's way," tweeted Tiger.
The film will see the actor reunite with his "Heropanti" team-- director Sabir Khan and producer Sajid Nadiadwala.
Shraddha, 26, who injured her leg while filming "ABCD 2", is happy she has been allowed by her physiotherapist to dance.
"Baaghi: A Rebel for Love" is set to release on April 29, 2016.