BUZZ-Valeant Pharmaceuticals: Appoints three new board members
** Canadian drugmaker's U.S.-listed shares up 5 pct at $66.01 premarket
** Company gives shareholder Pershing Square Capital Management a seat on its board and adds two additional directors
** Stephen Fraidin, veteran Wall Street lawyer who is vice chairman at William Ackman's Pershing Square, will join board along with Fred Eshelman and Thomas Ross
** Company under scrutiny for its accounting and business practices
** Ackman on Tuesday called embattled drug company a "very valuable asset" but said if situation does not stabilize soon new management will be brought in or company will be sold
** Up to Tuesday's close, stock had fallen 38 pct this year
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