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R&B singer R. Kelly is battling the flu on the road.

Kelly is currently touring North America with singer Keyshia Cole, and he insists the show must go on even though he feels terrible.

He has been guzzling flu medication in an effort to overcome the illness, but is afraid he won’t be in top form when he takes the stage in Nashville, Tennessee on Thursday night (July 14).

In a post on Twitter.com, he writes, “I refuse to take another cup of theraflu! I feel like my throat is coming back. I’ve been in bed sweating like crazy.”