Alicia Keys performed the National Anthem for Superbowl XLVII and has unoffically broke record for longest National Anthem at the Superbowl at 156.4 seconds according to David Barron of the Houston Chronicle
I clocked Alicia Keys at 156.4 seconds, breaking the SB mark of 152 seconds by Natalie Cole and choir in 1994.
— David Barron (@dfbarron) February 3, 2013