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The Oak Ridge Boys will fill in for Randy Travis this weekend as the ailing singer battles a serious health setback in a Texas hospital.  The Oaks will take Travis' slot at Saturday's Craven County Jamboree in Saskatchewan, Canada. 

But Oak Ridge Boy Joe Bonsall says audiences shouldn't expect them to perform any of Randy's songs.  He tells "The Dallas Morning News" a tribute to Travis would be premature.  Bonsall admits he's "very concerned and very worried about the singer's health.  He says he last time he saw Travis was at George Jones' funeral on May 2nd.  Joe recalls that Randy looked very strong, and was "clear-eyed, clear-headed and singing great."  Bonsall adds that everyone knows Travis has had "some weird problems in the last year," but says "what Randy needs right now are our prayers." 

Travis has been in critical condition since he was admitted to a Texas hospital on Sunday with an upper respiratory infection and congestive heart failure.  He underwent emergency surgery Wednesday night after suffering a stroke.

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