The popular rapper, whose duet with the halftime headliners was a No. 1 hit late last year, has reportedly turned down offers to take part in the show. Some rather odd choices — Christina Aguilera (5-1), Faith Hill (9-1) and Jennifer Lopez (9-1) — have been installed as the favorites to fill in during the performance of the song. Outkast rapper Big Boi, already a halftime performer this year, is listed at 150-1 in the same category, and national anthem singer Gladys Knight is 1,500-1.
Source: latimes.com – Los Angeles Times