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" Idina Menzel has revealed that she will perform a duet with Lea Michele in the third season of Glee. Menzel first appeared in the show&amp;#039;s first season as Shelby, the biological mother of Michele&amp;#039;s character Rachel. She recently signed up to reprise her role and has now told E! Online that she will be in &amp;quot;at least eight episodes&amp;quot;. Menzel promised that Shelby and Rachel will sing together again, saying: &amp;quot;I just came from the studio recording. I won&amp;#039;t say what it is, but it&amp;#039;s something with Lea and it&amp;#039;s one of the best songs ever written.&amp;quot; Menzel also revealed that fans will begin to learn more about Shelby as the season unfolds. &amp;quot;The only thing I can say is my character becomes definitely more multi-dimensional,&amp;quot; she teased. &amp;quot;She definitely has a big heart so we&amp;#039;ll see new aspects to her personality.&amp;quot; Anne Hathaway recently revealed that she is still hoping to land a guest role in a future episode of Glee. The show will return with its third season on September 20 on Fox. &amp;amp;gt; &amp;#039;Glee&amp;#039; Chris Colfer: &amp;#039;Kurt has a lot to cry about&amp;#039;&amp;amp;gt; Read more Glee coverage Watch Brad Falchuk talking to Digital Spy about Idina Menzel&amp;#039;s return below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/glee/news/a336622/glee-idina-menzel-promises-lea-michele-duet/>