TOBY KEITH is no longer quite so serious with his songs. His last two albums have included songs named "Red Solo Cup", "Cold Beer Country", "Haven't Had a Drink All Day", "I Like Girls That Drink Beer" and "Beers Ago". Well, his newest masterpiece is a duet with JIMMY BUFFETT called "Too Drunk to Karaoke". But don't hurt yourself looking for hidden meaning . . . everything you need to know is in the title.