Are we sure that mash-up is an actual track from the OST and not some "commercial" music inspired by the movie and utilizing Giacchino's work ?
Because even if it sounds really good, the utilization of a so well known and overused piece of music as "Ave Maria", with all the little "sound effects" around it, kind of make that little part sounding like a commercial to me.
If it's actually from the movie, then I'm very curious to found out the context, because that could end up a bit cheesy imo.
Second part of the track, starting at 1:10, is absolute fire though, I'm totally in love with that vibe !