John Travolta was praised by fans after he shared a touching message on Instagram following his return to social media earlier this week.The Pulp Fiction star uploaded a surprising video to wish rapper, Pitbull, a happy birthday on Friday.READ: John Travolta shares incredibly rare photo of son Ben following wife's tragic deathIn the clip, John said: "This is a message to Mr World Wide, Armando Perez, Pitbull. Chico, I just can't tell you how much it means to be in your life.