Ajay Devgn and Salman Khan seem to have become great friends. It was only a while ago that Salman took time out from his busy Dabangg 2 schedule to shoot a song titled Po Po for Ajay’s upcoming film, Son Of Sardar (SOS).Thrilled with the gesture, Ajay has now reciprocated it in a big way. The actor and his co-star Sonakshi Sinha recently shot for an episode of Kaun Banega Crorepati (KBC), and very generously donated their prize amount to Salman’s charity, Being Human. KBC host Amitabh Bachchan wrote on his blog along with a picture of the episode: “And as you can see had the lead pair of Son of Sardar their latest film on release — Ajay Devgn and Sonakshi Sinha, who came over to play for Salman Khan’s charity Being Human at KBC and Sonakshi teaching us a few elementary dance moves from the film (sic).”We’ve also heard that Salman was the one who made Ajay hear the song he’d shot for, a long time ago. So when the latter asked Sallu if he could use the song, he readily agreed. Reports also suggest that later, Ajay returned the favour by giving away Sonakshi’s dates for SOS promotions to Salman’s Dabangg 2 shooting.