The NFL made the announcement ahead of the kickoff of games on Sunday, with Mars joined by FOX co-host Terry Bradshaw and analyst Michael Strahan in Times Square.
The league's championship game will be played Feb. 2 at MetLife Stadium in East Rutherford, N.J.
Mars is one of pop music's top acts, with several No. 1 hits including his most recent, "When I Was Your Man."
The 27-year-old singer-songwriter-producer was honored for best male video and choreography for "Treasure" at the MTV Video Music Awards last month.
Halftime shows have drawn more than 100 million television viewers in the United States in past years.