'Star-Spangled Banner' Showdown: Mary J. Blige vs. Marsha Ambrosius

Mary J. Blige showed her stars and stripes on Saturday, performing the National Anthem at the 138th Kentucky Derby. Looking like a Southern belle in a red dress with matching hat and gloves, the Queen of Hip-Hop Soul put on a royal performance, winning praise from the 150,000 spectators.

Meanwhile, Marsha Ambrosius had the honor of singing “The Star-Spangled Banner” at the Mayweather vs. Cotto fight at the MGM Grand in Las Vegas later in the day. The British songstress got in the ring and flexed her vocal chops while delivering the patriotic anthem, later tweeting, “I do it! Living my dreams!!!”

Which R&B diva knocked it out of the park? Watch and weigh in below.