WASHINGTON (AP) — Toby Keith acknowledges that he's the type to hold a grudge. The 47-year-old country singer says certain things can be forgiven, "but if you're gonna tell a lie about me, and then back it up like it's the truth to try to make your star brighter ... yeah, I've got a problem with that." Keith has been in a number of public feuds over the years, including spats with Dixie Chicks singer Natalie Ma...