Who was featured in the second-best selling pay-per-view in UFC history?
UFC 116:  This was the third-best selling pay-per-view in UFC history behind UFC 194. UFC 194: UFC 194: Aldo vs. McGregor was a mixed martial arts event held by the Ultimate Fighting Championship on December 12, 2015 at the MGM Grand Garden Arena in Las Vegas, Nevada.
Aldo vs. McGregor