May 07, 1990 12:00 PM

>Singer Patti LaBelle shows up on the season finale of NBC’s A Different World (Thurs., May 3, 8:30 P.M. ET) as the doting mother of Dwayne Wayne (Kadeem Hardison). Since this pop powerhouse acts with as much vigor as she sings, Whitley (Jasmine Guy) is likely to be very sorry she ever trifled with that boy.

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