Aside from Beyonce and Rihanna, I've also been listening to a lot of Jessie J lately. She actually has a new US single which debuted online like a week ago. The song is called "Domino" and I immediately loved it from the first listen.
Try listening to it, too, and see for yourself:
Jessie J - Domino
She is one artist that I will not dare miss to see performing live, along with my other favorites, of course. Jessie J is actually one of my "British trio," I like to call them, which also includes the lovely Adele (I mean, who doesn't love her?) and the gorgeous and talented Pixie Lott.