Carey's commercial will reportedly feature her singing and, we can only assume, a fair amount of cleavage, if they're planning to stick with the Upton formula for whatever it is they're selling (cantaloupes?).
The ad will be directed by the director of Thor: The Dark World and Terminator Genisys, so obviously the makers of ... it (some kind of Roman soldier movie?) are going big with the campaign.
It looks like they can afford it, though.
According to a Google search just now the commercials are for Game of War: Fire Age (are you sure it's not beer?) and that mobile game app brings in an estimated $1 million per day in revenue.