Reba McEntire has one of the most pressure-filled performances to tackle on Sunday, but she’s ready. The Country icon will sing the National Anthem ahead of the Super Bowl. Considering the moment is closely watched by millions… and then compared to Whitney Houston’s version, singers know they have to get it right. Reba shares that she’s been practicing a lot, especially in front of boyfriend Rex Linn. "I’ve been singing the National Anthem in the shower [and] when we get in the car," adding "He’ll say, ‘OK, sing it one more time.’ I said, ‘I think I know the words real good right now, so I’m alright.’"