Backstage at "The Voice," Jackie Foster tells Access about how challenging it was to cover The Who's "Love Reign O'er Me." And, after tackling Rihanna's "Umbrella," Christiana Danielle teases what she'd like to cover next week. Then, Britton Buchanan talks flipping Ed Sheeran's "Perfect" by giving it a little Van Morrison influence. Plus, the Team Alicia performers dish on whether they get nervous on stage.