By Connie Bowker Jennifer Lopez spilled the secrets behind how she got into “fighting shape”. The 54-year-old On The Floor singer is currently gearing up to go on tour this summer, marking 25 years since the iconic popstar entered the music scene. J-Lo has boasted she is “ready to go”, and revealed how she has got into thebest shape of her life. The mother of two says that her “exhausting” filming schedule for her new movie has helped her slim down. J-Lo has also revealed that she is currently perfecting the final details for her upcoming This is Me… Now tour – which will kick off in America a…