Myles - who has already been announced as the recipient of this year's BRITs Rising Star Award - is also in the Pop Act and Song of the Year categories, as well as being up for Best New Artist.
Sabrina is nominated for International Artist Of The Year and International Song Of The Year, competing against the likes of Shaboozey and Teddy Swims for the latter.
Whilst the Last Dinner Party are up for Mastercard Album Of The Year, Best New Artist, Group Of The Year and Alternative/Rock Act.
They are both nominees this year, with Sam up for Artist Of The Year and Alternative/Rock Act.
JADE is nominated for Pop Act and her song Angel Of My Dreams is up for Song Of The Year With Mastercard.
