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"Kellie Pickler has signed on to appear in 90210.  The former American Idol contestant will portray Sally, Austin&amp;#039;s (Justin Deeley) cousin, for one episode on The CW series, according to TV Line.  Pickler will perform her single &amp;#039;Tough&amp;#039; on the episode in question. The singer wed her boyfriend Kyle Jacobs earlier this year. She described it as &amp;quot;the most incredible day&amp;quot; of her life, in spite of changing her original plans at the last minute. Singer Brandy, Sean Wing and Sarah Hagan are among the stars who have signed on to appear on the fourth season of the CW series. 90210 returns on September 13 on The CW.  Watch a clip of the third season finale of 90210 below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/90210/news/a335053/american-idols-kellie-pickler-to-star-on-90210/>