R&B Singer FANTASIA Shows Off Her New SUPER-FIT Body . . . The American Idol Winnner . . . Has SIX PACK ABS!!!

R&B singer Fantasia has been WORKING HARD at staying healthy - and its paying off dividends. A couple of days ago, the American Idol winner showed off her new body - and she looks amazing.

Fannie still has feminine curves - but now she has a SIX PACK.