Blaze is the only Jon song the majority of the crowd would know. The majority of the crowd don't associate the band with anything other than Jon so the likelihood of them knowing a Richie solo song is very slim. Cue thousands of people leaving for the toilets and bars and, before you know it, the energy the show had has evaporated. IBTFY goes over really well with the stadium crowds who are very difficult to get on your side, so I'd say it's a great call.