Jon Gosselin opened up on his decision to undergo a Botox-like procedure and a fat-burning treatment prior to hitting the stage for his DJ gig at Sundance Film Festival. After being booked for the star-studded event, Gosselin revealed he went to a pop-up of the Beverly Hills Rejuvenation Center, but the father-of-eight said he was “hesitant” at first to try anything new. “They asked me if I wanted Botox and I said, ‘Do I need Botox?!’ They advised me to get a little Dysport between my brows, which is very similar to Botox, and I decided just to go for it,” he told a news outlet. “Two of my rea…