Prince Amukamara -- We Have Dance Battles ... In Giants Locker Room

The NY Giants locker room is like the set of "You Got Served" and "8 Mile" wrapped into one -- with players challenging each other to dance and rap battles ... so says cornerback Prince Amukamara.

He's not joking ... Prince says it gets pretty crazy in there ... and when it comes to dance skills, P.A. tells us there's one guy who's "hands down" the best in the league.

As for rap skills, Prince says 3 guys stand out ... Dominique Rodgers-Cromartie, Odell Beckham Jr. and Victor Cruz.