Female vocalists asked to sing the National Anthem at the Super Bowl have outnumbered male vocalists by 2:1. This select group of male singers includes Barry Manilow, who was given the honor in 1984 at Super Bowl XVIII - the same Super Bowl made memorable for airing Apple's famous "1984" TV commercial that introduced the company's new Macintosh computer. (Beyonce's singing of the Anthem in 2004 was similarly overshadowed - by the scandalous "Nipplegate" incident during halftime.)
(Unfortunately, the clip of BM's performance that used to be in this space is no longer available.)
In addition to Manilow, other male singers who've sung the Star Spangled Banner include Neil Diamond; Billy Joel (twice); Aaron Neville (once solo, once w/Aretha Franklin); Harry Connick, Jr.; and Garth Brooks. Other divas have included Cher; Diana Ross; Whitney Houston; Mariah Carey; Jennifer Hudson - and Luther Vandross (in 1997).