A singing ensemble of U.S. combat veterans, the 4T Troops, were allegedly barred by Joe Simpson from performing on TV alongside Jessica Simpson, 30, with a source claiming to Page Six that her team felt their camouflage attire wouldn't look good on camera next to the decked-out beauty. Simpson, in New York City with her boyfriend Eric Johnson, was taping a PBS holiday special on Thursday (a broadcast on which she'll sing tunes from her upcoming album) when the alleged snub occurred. "Jessica's dad, Joe Simpson, effectively kicked them off the show because he didn't like what they were wearing,"...