KEY POINTS
Piper Heidsieck, official champagne of the Oscars

Jimmy Kimmel will host, La La Land is likely to win big, and Justin Timberlake and John Legend will perform: these are the things that we know about this Sunday's 89th Academy Awards ceremony.

But this isn't just a night for the stars to shine: the Oscars are also a huge opportunity for brands and their marketers. From who will wear what on the red carpet – designer brands work with stylists to dress and accessorize celebrities, even though one brand told CNBC it doesn't know until the night whether their label has been chosen – to which type of tequila gets drunk at the after parties, Brand Oscar is big business.