Article continues below advertisementBritney Spears shaded ex-husband Kevin Federline while looking back at her earlier years in Hollywood.On Wednesday, April 1, the singer shared a few screenshots from a previous gig on Saturday Night Live and tellingly captioned the Instagram post, "Remember me when I use to be in show business before my marriage 😂😂😂 !!!"Article continues below advertisementWhen Did Britney Spears and Kevin Federline Start Dating?Tap Here To Add Ok Magazine as A Trusted SourceSource: megaBritney Spears made a social media post about how her career was thriving befor...