KIMMEL KRUSHES LATE-NITE RIVALS!

Colbert Fallon ae as Jimmy urns the screws

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THE battle for late-night TV supremacy has turned once-friendly rivals Jimmy Kimmel, Jimmy Fallon and Stephen Colbert into increasingly bitter combatants as they desperately fight for ratings, say sources.

Kimmel, 56, has emerged as top dog, and industry insiders dish the snide host can't resist crowing about his show becoming the most-watched after hitting a seven-week all-time high in viewership!

"Kimmel's laughing all the way to the studio," spills an insider. "In contrast, there's panic on the other shows, and Fallon and Colbert themselves are scrambling to figure out how to fix things.