Fans walk out on Houston show

April 26, 2010 It's the latest in a series of shows that haven't lived up to high expectations during the singer's "Comeback" tour.

London critics say Houston missed high notes, cut songs short and apologized for her performance.

After struggling through her signature anthem, "I Will Always Love You," the star said, "Sometimes the old girl sings, but not tonight. She don't want to come, my soprano friend."

Just as she had during a recent faulty show, Houston complained about the air conditioning.

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