Danielle Bradbery, a semifinalist on NBC’s “The Voice,” will sing the national anthem at tonight’s Astros game against the Baltimore Orioles at Minute Maid Park. Bradbery, 16, advanced into the semifinal round as one of the top five artists in the fourth season of NBC’s vocal competition show. Before being chosen by coach Blake Shelton, Bradbery was attending Cypress Ranch High School. Her rendition of “Heads Carolina, Tails California,” originally by Jo Dee Messina, became the first song of the season to chart in the iTunes Top 10. _