NEW YORK -- The side-eye emoji was a fair choice reply to the NFL's announcement that R&B performer Jazmine Sullivan and country singer Eric Church would join forces to sing the national anthem at the Super Bowl.But the duo proved why they are multiple Grammy-nominated stars in their own right, blending their vocals beautifully to create a memorable, enjoyable rendition of “The Star Spangled Banner" on Sunday.Church kicked off the performance, strumming his guitar and giving all the feels with